116Z TRHT SP MS 0000001 C Pressure Vessel Spec [PDF]

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Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 1 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

TINRHERT FIELDS DEVELOPMENT FRONT END ENGINEERING AND DESIGN (FEED)

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS





C

06/05/2015

Approved for design

AAG

IZG

MFO

GEC

B

23/12/2014

Approved for design

AAG

IZG

MFO

GEC

A

30/10/2014

Issue for client comments

AAG

IZG

MFO

GEC

IA

17/10/2014

Issue for IDC

AAG

---

---

---

REV.

DATE

DESCRIPTION

PREPARED

CHECKED

APPR’D DPTM.

APPR’D PROJ.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 2 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

CONTENTS 1

INTRODUCTION ......................................................................................................................4 1.1

PROJECT DESCRIPTION ................................................................................................4

1.2

OVERALL DESCRIPTION OF TINRHERT DEVELOPMENT ...........................................5

1.3

PURPOSE OF THIS DOCUMENT ....................................................................................6

1.4

LANGUAGE ......................................................................................................................6

1.5

TERMINOLOGY ...............................................................................................................6

2

TERMS AND DEFINITIONS.....................................................................................................6

3

CODES, STANDARDS, REGULATIONS AND RULES ...........................................................8 3.1

INTERNATIONAL CODES AND STANDARDS ................................................................8

3.2

PROJECT SPECIFICATIONS...........................................................................................9

4

ORDER OF PRECEDENCE .....................................................................................................9

5

MATERIALS ..........................................................................................................................10

6

5.1

GENERAL.......................................................................................................................10

5.2

CLADDING AND WELD OVERLAY PLATES AND FORGINGS ....................................10

5.3

BOLT AND GASKETS ....................................................................................................11

DESIGN REQUIREMENTS ....................................................................................................11 6.1

DESIGN CODES.............................................................................................................11

6.2

ALLOWABLE STRESS ..................................................................................................12

6.3

LOADS ...........................................................................................................................12

6.3.1 INTERNAL OR EXTERNAL PRESSURE AND DESIGN TEMPERATURES ............12 6.3.2 CORROSION ...........................................................................................................13 6.3.3 WEIGHT AND EXTERNAL LOADS .........................................................................13 6.3.4 WIND, SNOW AND EARTHQUAKE LOADS ...........................................................13 6.3.5 THERMAL LOADS ...................................................................................................14 6.3.6 TEST PRESSURE ...................................................................................................14 6.4 CLADDING AND WELD OVERLAY ...............................................................................14 6.5

SHELL, CONES AND HEADS ........................................................................................14

6.6

STIFFERING RINGS.......................................................................................................15

6.7

NOZZLES .......................................................................................................................15

6.8

SUPPORTS ....................................................................................................................20

6.8.1 6.8.2

SKIRT ......................................................................................................................20 LEGS .......................................................................................................................21

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 3 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

6.8.3 SADDLES ................................................................................................................21 6.8.4 LUGS .......................................................................................................................21 6.9 LIFTING LUGS AND TRUNNIONS .................................................................................21 6.10 INSULATION AND FIREPROOGING SUPPORTS .........................................................22 6.11 INTERNALS ....................................................................................................................22 6.12 NAMEPLATE ..................................................................................................................22 7

FABRICATION REQUIREMENTS .........................................................................................23 7.1

GENERAL.......................................................................................................................23

7.2

WELDING REQUIREMENTS..........................................................................................23

7.2.1 WELDING PROCEDURES AND WELDERS QUALIFICATIONS.............................23 7.2.2 WELDING ................................................................................................................23 7.2.3 SHELL AND HEADS ................................................................................................23 7.2.4 NOZZLES ................................................................................................................24 7.3 STRESS RELIEVING......................................................................................................24 7.4 8

TOLERANCES................................................................................................................25

INSPECTION, TEST AND STAMP REQUIREMENTS ...........................................................25 8.1

INSPECTION AND EXAMINATION REQUIREMENTS ...................................................25

8.1.1 RADIOGRAPHIC EXAMINATION ............................................................................25 8.1.2 ULTRASONIC EXAMINATION.................................................................................25 8.1.3 MAGNETIC PARTICLES AND LIQUID PENENTRANT ...........................................26 8.2 PRESSURE TESTING REQUIREMENTS .......................................................................26 8.3 9

STAMPING REQUIREMENTS ........................................................................................27

PAINTING AND PREPARATION FOR SHIPMENT ...............................................................27 9.1

PAINTING .......................................................................................................................27

9.2

PREPARATION FOR SHIPMENT...................................................................................27

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 4 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

1

INTRODUCTION 1.1

PROJECT DESCRIPTION

SONATRACH has decided to develop the TINRHERT fields with its own resources these fields are in southeastern Algeria within the Wilaya of Illizi. The geographic position of these fields is indicated on the map below.

Figure 1-1: Geographic position map of the Tinrhert Fields

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 5 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

The development of these fields is intended for an additional hydrocarbon contribution to the facilities indicated below: •

Ohanet CPF

•

Alrar CPF

•

Existing Stah CPF

1.2

OVERALL DESCRIPTION OF TINRHERT DEVELOPMENT

The development of the Tinrhert fields is divided in four (4) lots as follows: • Lot 1: •

Gathering network for the North fields to the existing Ohanet CPF

•

Gathering network for the South fields to the existing Alrar CPF

•

Surface installations at the wellhead for the gas wells to be connected in the short term phase (twenty-six (26) wells to Ohanet CPF and twenty (20) to Alrar CPF)

• Lot 2: •

Surface installations at the wellhead for the gas wells to be connected in the medium term phase (twenty three (23) wells) and in the long-term phases (twenty three (23) wells.

•

New facilities inside Ohanet CPF

• Lot 3: •

Surface installations at the wellhead for twenty six (26) wells and their connection to the gathering network

•

Gathering network, and the electrical multiphase pumps stations needed for the Oil ring wells to the existing HP Inlet Separator train at Stah CPF.

•

New Compression unit at Stah CPF (3x50%) to handle the gas from new oil ring production only.

•

Gas export Line from new compression unit at Stah CPF to Alrar CPF.

•

New electrical overhead lines to the pumps stations.

• Lot 4: •

Surface installations at the wellhead for the wells to be connected in the medium term phase (sixty-two (62) wells) and in the long term phase (sixteen (16) wells).

•

New installation inside Alrar CPF

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 6 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

1.3

PURPOSE OF THIS DOCUMENT

The purpose of this Specification, together with the referenced Standards, Specifications and Codes, is to define the design, engineering, manufacture, assembly, inspection, testing, certification and preparation for shipment of Pressure Vessels for TINRHERT FIELDS DEVELOPMENT FRONT END ENGINEERING AND DESIGN (FEED) Project in Algeria. This specification covers all the Unfired Pressure Vessels contemplated by ASME VIII Div. 1 and ASME VIII Div. 2. Compliance by the SUPPLIER with the provisions of this Specification, does not relieve him of his responsibility to furnish equipment that is safe reliable economical and suitable for the specified conditions of service. 1.4

LANGUAGE

The Project language is English for all technical documents. Final Documentation as well as labels shall be in French and English. 1.5

TERMINOLOGY

The specific words used in this Technical Specification have the following meaning: Shall and must: Implies a mandatory requirement. Should: Implies a recommendation. May and Can: Implies one acceptable action, procedure or solution.

2

TERMS AND DEFINITIONS

For the purpose of the specification, the following definitions shall apply: CONTRACTING AUTHORITY or “CA”

: SONATRACH.

CONTRACTOR

: Company carrying out the Engineering, Procurement & Construction of the project or facility.

ENGINEER

: FEED contractor.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 7 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

PROJECT

: TINRHERT FIELDS DEVELOPMENT FRONT END ENGINEERING AND DESIGN (FEED).

ARH

: Agency for regulation of Hydrocarbons.

SUPPLIER (MANUFACTURER/VENDOR)

: Party that manufacture, supplies equipment, packages and service to perform the duty specified.

INDEPENDENT VERIFICATION BODY

: Inspection Body or Authority appointed by the CA

MAWP

: Maximum Allowable Working Pressure

MDMT

: Minimum Design Metal Temperature

PWHT

: Post Weld Heat Treatment

RT

: Radiographic Examination Test

UT

: Ultrasonic ExaminationTest

MT

: Magnetic Particle Test

PT

: Liquid Penetrant Test

ASME

: American Society of Mechanical Engineer

WRC

: Welding Research Council Bulletin

API

: American Petroleum Institute

EN

: European Norm

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 8 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

3

CODES, STANDARDS, REGULATIONS AND RULES 3.1

INTERNATIONAL CODES AND STANDARDS

ARH

Algerian Regulation des Hydrocarbures Decree of the Algerian republic no. 90-245 of 18th of August, 1990

DTR C ASME VIII Div.1 ASME VIII Div.2

Reglament Neige Et Vent “RNV 1999”- Algerian Codes Boiler and Pressure Vessel Code; Rules for Construction of Pressure Vessels Boiler & Pressure Vessel Code; Rules for Construction of Pressure Vessels - Alternative Rules

ASME II

Boiler and Pressure Vessel Code; Materials

ASME V

Boiler and Pressure Vessel Code; Non Destructive Examination

ASME IX WRC 107 WRC 297

Boiler & Pressure Vessel Code – Section IX; Welding and Brazing Qualifications Bulletin No.107: Local stresses in spherical and cylindrical shells due to external loading. Bulletin No.297: Local stresses in cylindrical shells due to external loadings on nozzles.

ASME B1.1

Unified Inch Screw Threads (UN and UNR Thread Form).

ASME B36.10

Welded and Seamless Wrought Steel Pipe

ASME B36.19

Stainless Steel Pipe

ASME B16.11

Forged Fittings, Socket-Welding and Threaded

ASME B16.20

Metallic Gaskets For Pipe Flanges (Ring-Joint, Spiral Wound and Jacketed)

ASME B16.5

Pipe Flanges and Flanged Fittings

ASME B16.47

Large Diameter Steel flanges

ASME B18.2

Square and Hex Bolts and Screws (inch series

ASME B46.1

Surface Texture (Surface roughness, waviness and lay).

EN 10204

Material Certification

ASME B&PV CODE, CODE CASE 2235

Use of Ultrasonic Examination in Lieu of Radiography Section I; Section VIII, Divisions 1 and 2; and Section XII

NACE

National Association of Corrosion Engineers (if applicable)

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 9 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

Latest edition of the above listed international codes and standards apply. 3.2

PROJECT SPECIFICATIONS

Number

Title

116Z-TRHT-TB-C-0000201

DESIGN BASIS Lot 2 Ohanet

116Z-TRHT-TB-C-0000202

PROCESS DESIGN CRITERIA Lot 2 Ohanet

116Z-TRHT-TB-C-0000401

DESIGN BASIS Lot 4 Alrar

116Z-TRHT-TB-C-0000402

PROCESS DESIGN CRITERIA Lot 4 Alrar

116Z-TRHT-SP-MT-0000002

ADDITIONAL MATERIAL REQUIREMENTS

116Z-TRHT-SP-MT-0000001

POSITIVE MATERIAL IDENTIFICATION

116Z-TRHT-TP-X-0000001

HSE DESIGN PHILOSOPHY

116Z-TRHT-SP-MI-0000001

INSULATION SPECIFICATION

116Z-TRHT-SP-MP-0000001

PAINTING AND COATING SPECIFICATION

116Z-TRHT-SP-MZ-0000001

WELDING SPECIFICATION

116Z-TRHT-LD-A-0000001

CODES, STANDARDS AND REGULATIONS

116Z-TRHT-AP-YT-0000001

SHIPPING AND TRANSPORTATION PLAN

4

ORDER OF PRECEDENCE

The following shall be the order of precedence of the specification: •

Algerian laws and regulations (Algerian laws, edicts, regional or local regulations).

•

Data sheet/ Material requisition.

•

This specification

•

International codes and standards.

It shall be the VENDOR'S responsibility to be, or to become, knowledgeable of the requirements of the reference codes, standards and Algerian laws and regulations. The VENDOR shall notify the CONTRACTOR of any apparent conflict between this specification, the related data sheets, the codes and standards and any other specifications noted herein. Resolution and/or interpretation of precedence shall be obtained from the COMPANY in writing before proceeding with the design/manufacture.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 10 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

5

MATERIALS 5.1

GENERAL

Material Specification or type of material shall be specified on the Datasheet. If not indicated, CONTRACTOR shall confirm the Vessel Materials or VENDOR shall propose suitable materials to CONTRACTOR’s approval in writing. VENDOR shall keep all the materials certificates for five years and the CONTRACTOR shall have free access to these certificates with all test required during the PROJECT. Substitutions of materials specified on the Datasheet will not be allowed without CONTRACTOR’s approval in writing. Materials shall meet all the requirements of document 116Z-TRHT-SP-MT-0000002 ADDITIONAL MATERIAL REQUIREMENTS. All pressure containing parts materials, welded to pressure containing parts and externals Bolts shall be certified at least in accordance with EN 10204 3.1 and shall be covered by ASME Code or applicable Design Code. Unless otherwise specified, all internal or external attachment welded directly to a pressure containing parts shall be the similar material, defined similar material as same P. Number and Group of ASME Code. Internal attachment in lined sections of the vessel shall be covered with same alloy lining. When welded directly to the lining, they shall be made of an alloy corresponding to the lining. All materials shall be suitable to MDMT and Design Temperature specified on the datasheet or Project specifications. Unless otherwise specified, Cast materials are not allowed. The Material Purchase Specification document shall be submitted to CONTRACTOR to approval before VENDOR buys the materials. Materials specification shall be suitable for design life of 25 years, except filter elements. 5.2

CLADDING AND WELD OVERLAY PLATES AND FORGINGS

If there are cost advantages, technical reasons or improvement in delivery time, VENDOR may propose the option of cladding or weld overlay materials during bid period.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 11 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

Explosion bounded cladding is not allowed. The use of solid alloy nozzles shall be expressly approved. Clad restoration and Weld Overlay shall be in accordance with WELDING SPECIFICATION 116ZTRHT-SP-MZ-0000001. 5.3

BOLT AND GASKETS

Unless otherwise specified, Threaded full length is required for all Stud Bolts and lubricant suitable for the Design Temperature shall be applied to the length threaded. Unless otherwise specified, Metric Bolts are not allowed for flanges. Type of thread shall be in accordance with ASME B1.1. Bolts for flanges with a diameter equal to or greater than 1-½” shall be provided with the clearance to use Bolt tensioning device. Gasket materials shall be specified on the datasheet. If not specified, VENDOR shall propose to CONTRACTOR’s approval in writing. The gasket materials suitable to the design Conditions (Design Temperature, Design Pressure) and the internal fluids. Asbestos materials are not allowed. For custom designed gaskets, the minimum contact width shall be according to ASME VIII Div.1 Mandatory Appendix 2 Table 2-4. Gaskets used for Hydro test shall not be considered as service gaskets.

6

DESIGN REQUIREMENTS 6.1

DESIGN CODES

Design Code of the Pressure Vessels shall be indicated on the datasheet. Unless otherwise specified, ASME VIII Code Cases are not allowed without expressly approved in writing. The Code Case 2235 (“Use of Ultrasonic Examination in Lieu of Radiography - Section I; Section VIII, Divisions 1 and 2; and Section XII”) is acceptable without approval.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 12 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS According to Article 2 of the decree of the Algerian republic no. 90-245 of 18th of August, 1990, Pressure Vessels shall be subject to the Algerian regulation when both conditions are simultaneously respected (for vessels that are not steam or hot water vessels): •

Design Pressure exceeds 4 barg

•

The product of Design Pressure, DP, (in bar) by Volume, V, (litre) of the equipment is over 80 {i.e. (DP x V) >= 80}.

6.2

ALLOWABLE STRESS

According to Article 5 of the decree of the Algerian republic no. 90-245 of 18th of August, 1990, If the Pressure Vessel is subjected to the Algerian regulation the allowable stress at design Temperatures must be lower than lesser of the following values: •

1/3 of Ultimate Tensile Strength of the metal at ambient Temperature

•

5/8 of the Metal Yield Stress (0.2%) at the Design Temperature.

•

Allowable Stress values according to applicable code.

6.3

LOADS

The loads combination shall be according to Table 5.3 of ASME VIII Div. 2. The loadings to be considered in the design of the Pressure Vessel are: 6.3.1

INTERNAL OR EXTERNAL PRESSURE AND DESIGN TEMPERATURES

Design Pressures and Design Temperatures shall be specified on the Datasheet. If not indicated, CONTRACTOR shall confirm the design Conditions. Unless otherwise specified on the data sheet the design pressure will be assumed to be at the top of the vessel in the operating position and the liquid level shall be considered for the components below the Maximum liquid level. Liquid level and density shall be specified by CONTRACTOR. Components which are subjected to different pressures shall be designed to withstand the full design pressure of each side assuming no pressure at the other side. If vacuum condition is specified, vacuum shall be assumed when calculating the differential pressure across the component. For the case of multi-compartment vessels, Differential Design Pressure shall be considered only if specified on Datasheet. Unless specified on the datasheet, Components which are subjected to different pressures the Design Temperature shall be the most restrictive of both sides.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 13 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

6.3.2

CORROSION

Corrosion allowance shall be specified on the datasheet. For internally compartmented vessels, the corrosion allowance shall be added to each side of the internal head or separation wall. For welded non-pressure internal components, the corrosion allowance shall be added to both faces. For removable components half corrosion allowance shall be added to each face in contact with the fluid. On fillet welds and seal welds of internal attachments, the full corrosion allowance shall be added to the thickness necessary for strength or tightness, measured across the throat (but not to exceed 10 mm). No corrosion allowance shall be considered on gasket bearing surfaces of nozzle flanges. 6.3.3

WEIGHT AND EXTERNAL LOADS

Vessels and their supports shall be designed to be self-supporting and shall be able to resist the effects of all applicable combinations of internal and external loads and forces. The following weights shall be considered in the Mechanical Calculation: •

Pressure Vessel Weight

•

Internals Weights

•

External Pipes or Platforms and ladders supported by the Pressure Vessel

•

Insulation or Fireproofing

•

Internal Fluids under operating and testing conditions

6.3.4

WIND, SNOW AND EARTHQUAKE LOADS

Seismic and Snow loads shall not be considered. For Wind loads the requirements of DTR C REGLAMENT NEIGE ET VENT “RNV 1999”ALGERIAN CODES shall be met. Wind loads shall be considered during hydrostatic test reducing to 30% of operation wind load unless otherwise specified. Seismic and Snow loads should not be considered during hydrostatic test. Design shall not consider both wind and seismic loads to be acting at the same time.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 14 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

For Vertical Vessels with the H/D ratio greater than 15, it is required to provide a Vortex shedding Vibration analysis in order to ensure structural stability. H is defined as the Height from bottom of support to upper tangent line and D is the outside diameter. The maximum deflection of columns, except for seismic loading, shall be no greater than 1/200 of the total height. 6.3.5

THERMAL LOADS

Thermal loads (gradient temperature, differential thermal expansion …), shall be considered. 6.3.6

TEST PRESSURE

A Future field test pressure calculation in the operating position shall be performed in the corroded condition at minimum 10ºC or 15ºC above the impact test, whichever is higher. During the hydrostatic test, the allowable stress of pressure parts shall not exceed 90% of the Yield Stress value. For vertical Pressure Vessels, if the Shop Pressure Test is in Horizontal position the operation liquid level shall be added to the Pressure Test in Vertical position. For Horizontal Pressure Vessels, additional saddles are not allowed for Shop and Field Test Pressure condition. 6.4

CLADDING AND WELD OVERLAY

Cladding and Weld Overlay will not be considered as resistant material. The resistant material shall be the total material thickness minus the cladding or weld overlay thickness minus the diluted weld thickness due to Restoration cladding or Weld Overlay. Therefore the internal diameter to consider in mechanical calculation shall be equal to specified internal diameter on data sheet plus twice the Cladding/Weld overlay thickness requested plus twice the diluted weld thickness due restoration cladding o weld overlay. 6.5

SHELL, CONES AND HEADS

Thickness specified are minimum, after forming and fabrication. Type of heads shall be specified on the data sheet. For Carbon Steel or Alloy Steel Vessels, the minimum thickness shall be equal or greater than the following values:

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 15 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

•

5 mm + corrosion

; (corrosion in mm)

•

0.001 · (ID + 2500) + corrosion; (ID= Internal diameter in mm and corrosion in mm)

Unless otherwise specified, the straight length of cones with knuckles and heads shall be equal or greater than 0.015 ID + T (ID = Internal diameter in mm; T= minimum thickness in mm) and 30 mm. 6.6

STIFFERING RINGS

For vertical Pressure Vessels, Section type of stiffening rings shall be oriented downwards to avoid water or other liquid retained between the Section and the vessel wall. For external Pressure calculation, the Shell-Cone junction shall be considered as Line support as defined in UG-28. External vacuum rings are preferred. External vacuum rings shall be insulated in a manner to maintain a temperature similar to that of the vessel shell. 6.7

NOZZLES

Unless otherwise specified, all nozzles shall be Set-in and full penetration. Unless otherwise specified, all nozzles shall be perpendicular to the true neutral axis. Unless otherwise specified, Flanges shall be Welding Neck and Raise Face. Unless otherwise specified, Flanges with a Nominal diameter from 26” to 60” shall be in accordance with ASME B16.47 Series A. Reinforcing pad materials shall be the same as the shell or head to which it is attached. Thickness of reinforcing pads shall not exceed vessel wall thickness. If not possible, reinforcement shall be done using a forged piece or increasing the vessel wall thickness, for example using an Insert plate. All bolts holes in flanges shall straddle center lines. All Pads shall be provided with holes ¼"NPT in the lower part as follows: 1) One hole in single piece reinforcing pad. 2) Where a pad is split, each segment shall have at least one hole.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 16 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

Nozzle equal or smaller than 10" shall be made from seamless pipe. Those greater than 10" may be made from formed plates. On vertical skirt-supported vessels all nozzle flanges located on the bottom head shall be brought outside the skirt. No internal flange is allowed. The minimum nozzle size shall be 1” for non-lined nozzles and 1 ½” for alloy lined nozzles. Nozzles shall be designed for external piping loads, such as may be produced from thermal expansion/contraction and weight. The local stress caused by nozzle loads shall be verified with the WRC 107 Bulletin or WRC 297 Bulletin or Finite Element Analysis. The minimum allowable piping forces and moments acting on nozzles of process vessels (i.e. columns, drums, etc.), shell and tube heat exchangers, vaporizers and terminal connections of packaged units, interconnected with piping are defined in table 1 shall be considered acting simultaneously with the design condition. For other load combinations including any occasional load (wind, relief valve discharge force, water hammer or temporary excursions above normal operating conditions), all the forces and moments shall be multiplied by a correction factor of 2.

NOMENCLATURE: Forces FL = Longitudinal FA = Axial FC = Circumferential

Moments ML = Longitudinal MT = Torsional MC = Circumferential

For spheres and heads: Resultant shear force:

Resultant bending moment

F=H FL2 + FC2

M=H ML2 + MC2

Note: All forces and moments are acting on the intersection of the nozzles axis with the mid thickness of the vessel shell or head plates.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 17 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

TABLE 1. ALLOWABLE FORCES & MOMENTS

150# FLANGE RATING

Forces kN

Moments kN·m

Nozzle Size "

FL

FA

FC

MC

MT

ML

2

2,6

2,6

2,0

0,3

0,4

0,3

3

3,9

3,9

2,9

0,6

0,9

0,8

4

5,2

5,2

3,9

1,0

1,6

1,4

6

7,8

7,8

5,9

2,3

3,5

3,0

8

10,4

10,4

7,8

4,2

6,2

5,4

10

13,0

13,0

9,8

6,5

9,8

8,5

12

15,6

15,6

11,7

9,4

14,0

12,2

14

18,2

18,2

13,7

12,7

19,1

16,6

16

20,8

20,8

15,6

16,6

25,0

21,6

18

23,4

23,4

17,6

21,1

31,6

27,4

20

26,0

26,0

19,5

26,0

39,0

33,8

24

31,2

31,2

23,4

37,4

56,2

48,7

26

33,8

33,8

25,4

43,9

65,9

57,1

28

36,4

36,4

27,3

51,0

76,4

66,2

30

39,0

39,0

29,3

58,5

87,8

76,1

32

41,6

41,6

31,2

66,6

99,8

86,5

34

44,2

44,2

33,2

75,1

112,7

97,7

36

46,8

46,8

35,1

84,2

126,4

109,5

Nozzle Size "

FL

FA

FC

MC

MT

ML

2

2.8

2.8

2,0

0.33

0,4

0.33

3

4.2

4.2

2,9

0.63

0,9

0.82

4

5.6

5.6

3,9

1.12

1,6

1.46

6

8.4

8.4

5,9

2.52

3,5

3.28

8

11.2

11.2

7,8

4.48

6,2

5.82

10

14

14

9,8

7

9,8

9.1

12

16.8

16.8

11,7

10.08

14,0

13.1

14

19.6

19.6

13,7

13.72

19,1

17.84

16

22.4

22.4

15,6

17.92

25,0

23.3

18

25.2

25.2

17,6

22.68

31,6

29.48

300# FLANGE RATING

Forces kN

Moments kN·m

20

28

28

19,5

28

39,0

36.4

24

33.6

33.6

23,4

40.32

56,2

52.42

26

36.4

36.4

25,4

47.32

65,9

61.52

28

39.2

39.2

27,3

54.88

76,4

71.34

30

42

42

29,3

63

87,8

81.9

32

44.8

44.8

31,2

71.68

99,8

93.18

34

47.6

47.6

33,2

80.92

112,7

105.2

36

50.4

50.4

35,1

90.72

126,4

117.94

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 18 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

600# FLANGE RATING

Forces kN

Moments kN·m

Nozzle Size "

FL

FA

FC

MC

MT

ML

2

3,2

3,2

2,4

0,3

0,5

0,4

3

4,8

4,8

3,6

0,7

1,1

0,94

4

6,4

6,4

4,8

1,3

1,9

1,7

6

9,6

9,6

7,2

2,9

4,3

3,7

8

12,8

12,8

9,6

5,1

7,7

6,7

10

16,0

16,0

12,0

8,0

12,0

10,4

12

19,2

19,2

14,4

11,5

17,3

15,0

14

22,4

22,4

16,8

15,7

23,5

20,4

16

25,6

25,6

19,2

20,5

30,7

26,6

18

28,8

28,8

21,6

25,9

38,9

33,7

20

32,0

32,0

24,0

32,0

48,0

41,6

24

38,4

38,4

28,8

46,1

69,1

59,9

26

41,6

41,6

31,2

54,1

81,1

70,3

28

44,8

44,8

33,6

62,7

94,1

81,5

30

48,0

48,0

36,0

72,0

108,0

93,6

32

51,2

51,2

38,4

81,9

122,9

106,5

34

54,4

54,4

40,8

92,5

138,7

120,2

36

57,6

57,6

43,2

103,7

155,5

134,8

Nozzle Size "

FL

FA

FC

MC

MT

ML

2

3,6

3,6

2,7

0,4

0,5

0,5

3

5,4

5,4

4,1

0,8

1,2

1,1

4

7,2

7,2

5,4

1,4

2,2

1,9

6

10,8

10,8

8,1

3,2

4,9

4,2

8

14,4

14,4

10,8

5,8

8,6

7,5

10

18,0

18,0

13,5

9,0

13,5

11,7

12

21,6

21,6

16,2

13,0

19,4

16,8

14

25,2

25,2

18,9

17,6

26,5

22,9

16

28,8

28,8

21,6

23,0

34,6

30,0

18

32,4

32,4

24,3

29,2

43,7

37,9

20

36,0

36,0

27,0

36,0

54,0

46,8

24

43,2

43,2

32,4

51,8

77,8

67,4

26

46,8

46,8

35,1

60,8

91,3

79,1

28

50,4

50,4

37,8

70,6

105,8

91,7

30

54,0

54,0

40,5

81,0

121,5

105,3

32

57,6

57,6

43,2

92,2

138,2

119,8

34

61,2

61,2

45,9

104,0

156,1

135,3

36

64,8

64,8

48,6

116,6

175,0

151,6

900# FLANGE RATING

Forces kN

Moments kN·m

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 19 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

1500# FLANGE RATING

Forces kN

Moments kN·m

Nozzle Size "

FL

FA

FC

MC

MT

ML

2

4,0

4,0

3,0

0,4

0,6

0,5

3

6,0

6,0

4,5

0,9

1,4

1,2

4

8,0

8,0

6,0

1,6

2,4

2,1

6

12,0

12,0

9,0

3,6

5,4

4,7

8

16,0

16,0

12,0

6,4

9,6

8,3

10

20,0

20,0

15,0

10,0

15,0

13,0

12

24,0

24,0

18,0

14,4

21,6

18,7

14

28,0

28,0

21,0

19,6

29,4

25,5

16

32,0

32,0

24,0

25,6

38,4

33,3

18

36,0

36,0

27,0

32,4

48,6

42,1

20

40,0

40,0

30,0

40,0

60,0

52,0

24

48,0

48,0

36,0

57,6

86,4

74,9

26

52,0

52,0

39,0

67,6

101,4

87,9

28

56,0

56,0

42,0

78,4

117,6

101,9

30

60,0

60,0

45,0

90,0

135,0

117,0

32

64,0

64,0

48,0

102,4

153,6

133,1

34

68,0

68,0

51,0

115,6

173,4

150,3

36

72,0

72,0

54,0

129,6

194,4

168,5

Nozzle Size " 2

FL 4.40

FA 4.40

FC 3.30

MC 0.44

MT 0.66

ML 0.55

3

6.60

6.60

4.95

0.99

1.49

1.29

4

8.80

8.80

6.60

1.76

2.64

2.29

6

13.20

13.20

9.90

3.96

5.94

5.15

8

17.60

17.60

13.20

7.04

10.56

9.15

10

22.00

22.00

16.50

11.00

16.50

14.30

12

26.40

26.40

19.80

15.84

23.76

20.59

14

30.80

30.80

23.10

21.56

32.34

28.03

16

35.20

35.20

26.40

28.16

42.24

36.61

18

39.60

39.60

29.70

35.64

53.46

46.33

20

44.00

44.00

33.00

44.00

66.00

57.20

24

52.80

52.80

39.60

63.36

95.04

82.37

26

57.20

57.20

42.90

74.36

111.54

96.67

28

61.60

61.60

46.20

86.24

129.36

112.06

30

66.00

66.00

49.50

99.00

148.50

128.67

32

70.40

70.40

52.80

112.64

168.96

146.37

34

74.80

74.80

56.10

127.16

190.74

165.29

36

79.20

79.20

59.40

142.56

213.84

185.31

2500# FLANGE RATING

Forces kN

Moments kN·m

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 20 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

6.8

SUPPORTS

Type of support shall be indicated on the datasheet. Dimensions of supports shall be according to PROJECT standards but VENDOR shall confirm the design considering all loads described on Paragraph 5.2 of this specification. VENDOR shall define the Nominal Diameter of the Anchor Bolt. Anchor bolts holes are necessary for all supports regardless not require them by rules. The minimum anchor bolt size is ¾” (M20). Shell thickness shall be analysed according to ASME VIII Div. 2 paragraph 4.15 or LP-ZICK Analysis. Friction Load, Wind, Seismic and Snow loads as defined on paragraph 5.2.14 and 5.2.15 and weight loads as defined on paragraph 5.2.13 shall be considered. All the Pressure vessels require two stainless steel earth lugs per pressure vessel. Type and dimensions of earth lugs shall be according to PROJECT specifications. 6.8.1

SKIRT

The top of all skirts shall of the same material as the Pressure Vessel as specified on the PROJECT standards. The minimum skirt thickness is 6 mm. Joint efficiency considered in stability calculations for the joint between the lower head and the skirt shall be 0.55 and 0.7 for the joint between the base ring and the skirt. The skirt shall be equipped with vent openings and access opening in accordance with Project Standards. Anchor bolts holes are to straddle center lines of vessel. The number of anchor bolts shall be multiple of four. VENDOR shall supply a Carbon Steel washer for each Anchor bolt loose and washers shall be welded in Field by CONTRACTOR. Hot Box is required if one of the following requirements is met: •

For cold insulation

•

Hot insulation with temperature above 345ºC

•

Wall thickness above 50 mm and Temperature above 260ºC

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 21 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

If Hot Box is required, a thermal and mechanical calculation shall be performed as indicated in Paragraph 4.15.4 (c) of ASME VIII Div. 2. VENDOR shall provide skirt bracing, if necessary, to avoid bucking during transport or lifting. VENDOR shall furnish a template with the dimensions of the Base plate for columns, unless otherwise specified. The template shall be drilled with the final base plate or perform two templates drilled at the same time, one will be sent to Field and the other one shall be used like template for the fabrication of the base plate. North shall be clearly indicated on the templates and on the Base plate. 6.8.2

LEGS

The minimum number of legs is three per vessel. VENDOR shall perform the WRC 107 calculation for the leg to shell junction and the leg buckling calculation according to AISC. 6.8.3

SADDLES

Horizontal vessels shall be supported by two saddles. Unless otherwise specified, additional saddles are not allowed without CONTRACTOR’s approval in writing. All saddles shall be supplied with wear plate with all corners rounded. The bolt slot shall be confirmed to facilitate thermal expansion along the longitudinal axis of vessel. An even number of anchor bolts shall be provided with a minimum of two anchor bolts per saddle. 6.8.4

LUGS

A reinforcement pad is required at the junction of Lugs to shell. VENDOR shall perform the WRC 107 calculation for the lug to shell junction. 6.9

LIFTING LUGS AND TRUNNIONS

The equipment shall include metallic elements for lifting and handling, such as lugs and/or trunnions.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 22 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

Unless otherwise required, Lifting Lugs or Trunnions shall be designed for 1.5 times the lifting weight and shall not be removed after erection. Lifting Lugs or Trunnions shall be designed and orientated in order to avoid interferences during lift. VENDOR shall show clearly in the Lifting Drawing if temporary stiffening beam is required. For slender vertical Pressure Vessels with a length over diameter ratio of 10 or more, VENDOR shall include a calculation to check the bending stresses and tension/compression (bucking) in the shell resulting from the horizontal to vertical position. All removable part that weights is equal or larger than 25 kg shall be supplied with lifting devices (pins, lugs …). Manholes and any Blind cover for Nominal diameter 16” and larger shall be supplied with davit or hinge. Lifting devices, davits and hinges shall be according to applicable standards. 6.10 INSULATION AND FIREPROOGING SUPPORTS Type and dimensions of Insulation and Fireproofing supports shall be according to PROJECT standards. 6.11 INTERNALS All removable internals in the VENDOR scope shall be designed to pass through vessels manways. All non-removable internals shall be welded before hydraulic test. 6.12 NAMEPLATE All vessels shall be provided with nameplates. Nameplates shall be in English and French. The minimum information that shall show the Nameplate is specified in Article 7 of Decree of the Algerian republic no. 90-245 of 18th of August, 1990. Nameplate shall be made of Stainless Steel and shall be attached to a welded support to a pressure part of the vessel in a visible area.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 23 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

7

FABRICATION REQUIREMENTS 7.1

GENERAL

The Pressure Vessel shall be manufactured entirely at workshop. 7.2 7.2.1

WELDING REQUIREMENTS WELDING PROCEDURES AND WELDERS QUALIFICATIONS

All the welding procedures shall be qualified according to ASME IX and all the additional requirements of documents listed on Paragraph 3 of this specification. 7.2.2

WELDING

Welding shall be carried out in accordance with ASME IX in combination with ASME VIII Div.1 or ASME VIII Div.2, this specification, the vessel datasheet and the welding specification 116ZTRHT-SP-MZ-0000001 (WELDING SPECIFICATION). Production welding shall not commence without advance written approval from CONTRACTOR, otherwise, welds can be rejected by CONTRACTOR. Unless otherwise specified, all welds shall be continuous. 7.2.3

SHELL AND HEADS

For Pressure Vessels diameters less or equal to 2 m, shells shall be performed with only a Longitudinal Weld and Heads shall be seamless. Longitudinal or Circumferential welds shall be full penetration and preferably double side groove weld. Unless otherwise specified, Butt Welding of Plates of Unequal Thickness shall be according to ASME VIII Div.1 Figure UW-9 (b) and the taper shall be external. Seams of shells shall be located so that they do not interfere with nozzles, supports and any other welded element. Orientation of Longitudinal welds should avoid the angles 0º, 90º, 180º and 270º angles.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 24 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

The VENDOR shall show all the longitudinal and circumferential welds in the detail drawings. These welds shall be oriented in order to avoid interferences with nozzles and other internal or external attachments. The minimum distance to be maintained between welds shall be three times the wall thickness, but not less than 50 mm. Exceptions shall be approved by CONTRACTOR. 7.2.4

NOZZLES

Nozzles shall be cut flush with the internal surface of shell or head and the internal edge of nozzles shall be rounded. When internal projection is necessary it shall be specified in data sheet. 7.3

STRESS RELIEVING

The PWHT must be done when required by code or by service condition as specified in vessel datasheet. When PWHT is required, a written procedure must be submitted by VENDOR, with full description including, at least: equipment to be used, heating method, thermocouples type and location, heating and cooling rates, holding time, treatment temperature. The Vessel must always be PWHT in only one piece. Exception are closure seams of special or large items which shall be locally PWHT with previous CONTRACTOR’s approval. All external attachment welded to pressure retaining parts shall be welded before heat treatment. Further weld execution admitted by code requires prior approval from CONTRACTOR. For Lethal service PWHT is required for Carbon Steel and Low Alloy Steels. Flange faces and threaded surfaces shall be adequately protected against oxidation during heat treatment. Vessels shall be placed into the furnace so that in no case direct flame contact is produced. To prevent plastic or permanent deformation, vessels and/or components must be properly supported, in such way to allow free expand during treatment. If bottom head requires PWHT, the top portion of the skirt shall at least be heat treated with the vessel. Heat treated vessels shall have a Warning plate with water proof paint with letters 200 mm height minimum saying: “HEAT TREATED – DO NOT WELD ON THIS VESSEL”.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 25 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

7.4

TOLERANCES

Vessel tolerances shall be specified by PROJECT standards. The tolerances of internals supports shall be the most restrictive of PROJECT standards and the Internal VENDOR tolerances.

8

INSPECTION, TEST AND STAMP REQUIREMENTS 8.1

INSPECTION AND EXAMINATION REQUIREMENTS

CONTRACTOR’s Inspectors shall have free access to Vendor’s Shop during construction and they can perform total or partial inspections to the materials and to the Pressure Vessel. Inspectors can perform a final Inspection to verify if all the PURCHASE ORDER requirements and all the documents are according to PURCHASE ORDER. Hydrostatic test shall be witnessed by Inspectors and VENDOR shall notify of Hydraulic Test date at least 45 days in advance, unless otherthing indicated. VENDOR shall provide to the Inspectors all necessary elements in order to verify that the Pressure vessel and its elements are according to the contractual requirements. The Supplier shall submit for CONTRACTOR’s approval the required procedures of NDT for the Pressure vessel according to the design codes and ASME V. 8.1.1

RADIOGRAPHIC EXAMINATION

If nozzle is made from formed plate weld shall be fully RT as defined on ASME VIII. If head is made from a welded plate shall be fully RT as defined on ASME VIII. 8.1.2

ULTRASONIC EXAMINATION

UT may be substitute for RT when it is impractical due to design construction or interpretable radiographs are not possible. In such cases, the extend of examination shall be as specified for RT. For set-in type nozzles, surface holes in shells and heads shall be tested by UT to prevent lamellar tearing.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 26 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

8.1.3

MAGNETIC PARTICLES AND LIQUID PENENTRANT

For MT, use of permanent magnetic yokes is not permitted. After grounding and before welding, all the welding edges shall be inspected by MT or PT. After removal of all surfaces of temporary attachments, including thermocouples using for PWHT control, shall be inspected by MT or PT method. Forging surfaces after machining shall be MT examined. All the surfaces inspected shall be cleaned suitably before welding. 8.2

PRESSURE TESTING REQUIREMENTS

A hydrostatic test Procedure shall be submitted for CONTRACTOR’s approval. Unless otherwise specified, Pneumatic test of Pressure Vessel is not allowed. When the equipment is subject to the Algerian regulation, the hydrotest pressure shall be calculated as per both ASME VIII Code and Decree 90-245 (test P = 1.5 x Design Pressure), and the maximum value shall be applied. The water used for Hydraulic Test shall be potable and water Temperature shall be the room temperature (minimum 10ºC or 15ºC above the impact test, whichever is higher). For Austenitic Stainless Steel parts of Pressure vessel, the water used during the hydraulic test shall not contain more than 30 ppm chlorides. The test pressure shall be maintained for at least 1 hour. Pressure Vessel shall be tested before painting and after PWHT and shall be dry and clean after the Hydraulic Test thoroughly of grease, loose scale, rust, flux or any strange element. Draining shall be executed in such a way to prevent the development of vacuum pressure within the vessel or its internals. Pneumatic test is required for all the pads at a pressure of 1.4 bar.

Project: Code: Rev: C

116Z 116Z-TRHT-SP-MS-0000001 Sheet 27 of 27

MECHANICAL SPECIFICATION FOR PRESSURE VESSELS

8.3

STAMPING REQUIREMENTS

All Pressure Vessels that met the requirements of Article 2 of the decree of the Algerian republic no. 90-245 of 18th of August, 1990 (see Paragraph 6.1 of this specification), shall be stamped according to Algerian Regulation.

9

PAINTING AND PREPARATION FOR SHIPMENT 9.1

PAINTING

Paining requirements shall be as per specification 116Z-TRHT-SP-MP-0000001 PAINTING AND COATING SPECIFICATION. 9.2

PREPARATION FOR SHIPMENT

VENDOR shall consider the proper protection of the Pressure Vessel in order to avoid any deformation during the Shipment and storage. Any elements required for transportation (i.e. transport saddles) shall be furnished by VENDOR. The calculation for erecting and transport elements verifying the local stresses in the equipment shall be included in the VENDOR’s scope. For vertical Pressure Vessel, steel saddles are required. Transport requirements shall be as per specification 116Z-TRHT-AP-YT-0000001 (SHIPPING AND TRANSPORTATION PLAN) or requisition. Screwed openings shall be protected with screwed plugs.