Petroleum, petrochemical and natural gas industries - Hairpin-type heat exchangers (ISO 12212:2012)

This International Standard specifies requirements and gives recommendations for the mechanical design, materials selection, fabrication, inspection, testing and preparation for shipment of hairpin heat exchangers for use in the petroleum, petrochemical and natural gas industries. Hairpin heat exchangers include double-pipe and multi-tube type heat exchangers.

Erdöl-, petrochemische und Erdgasindustrie - Haarnadel -Wärmetauscher (ISO 12212:2012)

Industries du pétrole et du gaz naturel - Échangeurs thermiques en épingle à cheveux (ISO 12212:2012)

L'ISO 12212:2012 spécifie les exigences et fournit des recommandations pour la conception mécanique, le choix des matériaux, la fabrication, le contrôle, les essais et la préparation à l'expédition des échangeurs thermiques tubulaires en épingle à cheveux utilisés dans les industries du pétrole, de la pétrochimie et du gaz naturel.
Les échangeurs thermiques à tubes jumelés et multitubes sont inclus dans les échangeurs thermiques tubulaires en épingle à cheveux.

Petrokemična industrija ter industrija za predelavo nafte in zemeljskega plina - Tipi prenosnikov toplote v obliki lasnice (ISO 12212:2012)

Ta mednarodni standard podaja zahteve in priporočila v zvezi z mehanskim načrtovanjem, izbiro materialov, izdelavo, nadzorom, pregledom ter pripravo za pošiljanje tipov prenosnikov toplote v obliki lasnice za uporabo v petrokemični industriji ter industriji za predelavo nafte in zemeljskega plina. Prenosniki toplote v obliki lasnice vključujejo dvojnocevne in večcevne tipe prenosnikov toplote.

General Information

Status
Published
Public Enquiry End Date
04-May-2010
Publication Date
09-Sep-2012
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
13-Aug-2012
Due Date
18-Oct-2012
Completion Date
10-Sep-2012

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Standards Content (sample)

SLOVENSKI STANDARD
SIST EN ISO 12212:2012
01-oktober-2012

3HWURNHPLþQDLQGXVWULMDWHULQGXVWULMD]DSUHGHODYRQDIWHLQ]HPHOMVNHJDSOLQD7LSL

SUHQRVQLNRYWRSORWHYREOLNLODVQLFH ,62

Petroleum, petrochemical and natural gas industries - Hairpin-type heat exchangers (ISO

12212:2012)
Erdöl-, petrochemische und Erdgasindustrie - Haarnadel -Wärmetauscher (ISO
12212:2012)

Industries du pétrole et du gaz naturel - Échangeurs thermiques en épingle à cheveux

(ISO 12212:2012)
Ta slovenski standard je istoveten z: EN ISO 12212:2012
ICS:
71.120.30 Prenosniki toplote Heat exchangers
75.180.20 Predelovalna oprema Processing equipment
SIST EN ISO 12212:2012 en,fr

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 12212:2012
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SIST EN ISO 12212:2012
EUROPEAN STANDARD
EN ISO 12212
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2012
ICS 75.180.20; 27.060.30
English Version
Petroleum, petrochemical and natural gas industries - Hairpin-
type heat exchangers (ISO 12212:2012)

Industries du pétrole et du gaz naturel - Échangeurs Erdöl-, petrochemische und Erdgasindustrie - Haarnadel -

thermiques en épingle à cheveux (ISO 12212:2012) Wärmetauscher (ISO 12212:2012)
This European Standard was approved by CEN on 27 April 2012.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same

status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12212:2012: E

worldwide for CEN national Members.
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SIST EN ISO 12212:2012
EN ISO 12212:2012 (E)
Contents Page

Foreword ..............................................................................................................................................................3

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SIST EN ISO 12212:2012
EN ISO 12212:2012 (E)
Foreword

This document (EN ISO 12212:2012) has been prepared by Technical Committee ISO/TC 67 "Materials,

equipment and offshore structures for petroleum, petrochemical and natural gas industries" in collaboration

with Technical Committee CEN/TC 12 “Materials, equipment and offshore structures for petroleum,

petrochemical and natural gas industries” the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by February 2013, and conflicting national standards shall be withdrawn

at the latest by February 2013.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech

Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Endorsement notice

The text of ISO 12212:2012 has been approved by CEN as a EN ISO 12212:2012 without any modification.

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SIST EN ISO 12212:2012
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SIST EN ISO 12212:2012
INTERNATIONAL ISO
STANDARD 12212
First edition
2012-08-01
Petroleum, petrochemical and natural gas
industries — Hairpin-type heat
exchangers
Industries du pétrole et du gaz naturel — Échangeurs thermiques en
épingle à cheveux
Reference number
ISO 12212:2012(E)
ISO 2012
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SIST EN ISO 12212:2012
ISO 12212:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,

electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or

ISO's member body in the country of the requester.
ISO copyright office
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved
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SIST EN ISO 12212:2012
ISO 12212:2012(E)
Contents Page

Foreword ............................................................................................................................................................. v

Introduction ........................................................................................................................................................ vi

1  Scope ...................................................................................................................................................... 1

2  Normative reference .............................................................................................................................. 1

3  Terms and definitions ........................................................................................................................... 1

4  General ................................................................................................................................................... 3

5  Proposal information required ............................................................................................................. 4

6  Drawings and other required data ....................................................................................................... 4

6.1  Outline drawings and other supporting data...................................................................................... 4

6.2  Information required after outline drawings are reviewed ................................................................ 5

6.3  Reports and records ............................................................................................................................. 6

7  Design ..................................................................................................................................................... 7

7.1  Design temperature ............................................................................................................................... 7

7.2  Design pressure .................................................................................................................................... 7

7.3  Cyclic design ......................................................................................................................................... 7

7.4  Shell ........................................................................................................................................................ 8

7.5  Front closure .......................................................................................................................................... 8

7.6  Rear closure ......................................................................................................................................... 10

7.7  Tube bundle ......................................................................................................................................... 11

7.8  Nozzles and other connections ......................................................................................................... 14

7.9  Shell supports ...................................................................................................................................... 18

7.10  Gaskets ................................................................................................................................................. 19

7.11  Flanged external girth joints .............................................................................................................. 19

7.12  Cladding for corrosion allowance ..................................................................................................... 19

8  Materials ............................................................................................................................................... 20

8.1  General ................................................................................................................................................. 20

8.2  Requirements for carbon steel in sour or wet hydrogen sulfide service ...................................... 20

8.3  Gaskets ................................................................................................................................................. 20

8.4  Tubes .................................................................................................................................................... 20

9  Fabrication ........................................................................................................................................... 21

9.1  Shells .................................................................................................................................................... 21

9.2  Tubes .................................................................................................................................................... 21

9.3  Welding ................................................................................................................................................. 21

9.4  Heat treatment ..................................................................................................................................... 22

9.5  Dimensional tolerances ...................................................................................................................... 22

9.6  Gasket contact surfaces other than nozzle flange facings ............................................................. 23

9.7  Tube-to-tubesheet joints ..................................................................................................................... 23

9.8  Assembly .............................................................................................................................................. 24

10  Inspection and testing ........................................................................................................................ 24

10.1  Quality assurance ................................................................................................................................ 24

10.2  Quality control ..................................................................................................................................... 24

10.3  Pressure testing .................................................................................................................................. 26

10.4  Nameplates and stampings ................................................................................................................ 26

11  Preparation for shipment .................................................................................................................... 27

11.1  Protection ............................................................................................................................................. 27

11.2  Identification ........................................................................................................................................ 27

© ISO 2012 – All rights reserved iii
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SIST EN ISO 12212:2012
ISO 12212:2012(E)

12  Supplemental requirements ...............................................................................................................28

12.1  General ..................................................................................................................................................28

12.2  Design ...................................................................................................................................................28

12.3  Examination ..........................................................................................................................................28

Annex A (informative) Recommended practices ...........................................................................................30

Annex B (informative) Hairpin heat exchanger checklist ..............................................................................32

Annex C (informative) Hairpin heat exchanger data sheets .........................................................................34

Bibliography ......................................................................................................................................................45

iv © ISO 2012 – All rights reserved
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SIST EN ISO 12212:2012
ISO 12212:2012(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies

(ISO member bodies). The work of preparing International Standards is normally carried out through ISO

technical committees. Each member body interested in a subject for which a technical committee has been

established has the right to be represented on that committee. International organizations, governmental and

non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the

International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 12212 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures

for petroleum, petrochemical and natural industries, Subcommittee SC 6, Processing equipment and systems.

© ISO 2012 – All rights reserved v
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SIST EN ISO 12212:2012
ISO 12212:2012(E)
Introduction

It is necessary that users of this International Standard be aware that further or differing requirements can be

needed for individual applications. This International Standard is not intended to inhibit a vendor from offering,

or the purchaser from accepting, alternative equipment or engineering solutions for the individual application.

This can be particularly applicable where there is an innovative or developing technology. Where an

alternative is offered, it is the responsibility of the vendor to identify any variations from this International

Standard and provide details.

This International Standard requires the purchaser to specify certain details and features.

A bullet () at the beginning of a clause or subclause indicates a requirement for the purchaser to make a

decision or provide information (for information, a checklist is provided in Annex B).

In this International Standard, where practical, US Customary (USC) or other units are included in

parentheses for information.
vi © ISO 2012 – All rights reserved
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SIST EN ISO 12212:2012
INTERNATIONAL STANDARD ISO 12212:2012(E)
Petroleum, petrochemical and natural gas industries — Hairpin-
type heat exchangers
1 Scope

This International Standard specifies requirements and gives recommendations for the mechanical design,

materials selection, fabrication, inspection, testing and preparation for shipment of hairpin heat exchangers for

use in the petroleum, petrochemical and natural gas industries.
Hairpin heat exchangers include double-pipe and multi-tube type heat exchangers.
2 Normative reference

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.

ISO 15156 (all parts), Petroleum and natural gas industries — Materials for use in H S-containing

environments in oil and gas production

ISO 23251, Petroleum, petrochemical and natural gas industries — Pressure-relieving and depressuring

systems

ASME B16.5 , Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard

NACE MR0103 , Materials Resistant to Sulfide Stress Cracking in Corrosive Petroleum Refining Environments

NACE SP0472, Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel

Weldments in Corrosive Petroleum Refining Environments
TEMA , Standards of the Tubular Exchanger Manufacturers Association
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
cyclic service

process operation with periodic variation in temperature, pressure and/or flowrate

ASME International, 3 Park Avenue, New York, NY 10016-5990, USA.
NACE International, P.O. Box 218340, Houston, TX 77218-8340, USA.

Tubular Exchanger Manufacturers Association, 25 North Broadway, Tarrytown, NY 10591, USA.

© ISO 2012 – All rights reserved 1
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SIST EN ISO 12212:2012
ISO 12212:2012(E)
3.2
double-pipe
single pipe within a shell
3.3
effective heat transfer area

outside surface area of the tubes that contributes to heat transfer including finned surface area (if any)

3.4
full-penetration weld

welded joint that results in weld metal through the entire thickness of the components being joined

3.5
front closure

closure that connects the tube side to purchaser’s tube side piping and fixes the tube bundle or element to the

shell
3.6
hairpin heat exchanger

double-pipe (pipe-in-pipe) or multi-tube heat exchanger of two-leg bundle where each leg has its own

separate shell
NOTE Figure 1 shows typical components of a hairpin heat exchanger.
3.7
heat exchanger unit

one or more heat exchangers arranged in series or parallel for a specified service that work together to

perform the intended duty
3.8
hydrogen service

service that contains hydrogen at a partial pressure exceeding 700 kPa (100 psi) absolute

3.9
item number
purchaser’s identification number for a hairpin heat exchanger
3.10
minimum design metal temperature

lowest metal temperature at which pressure-containing elements can be subjected to design pressure

EXAMPLES Ambient temperature or process fluid temperature.
3.11
multi-tube
multiple tubes within a shell
3.12
pressure design code
recognized pressure vessel standard specified or agreed by the purchaser
EXAMPLES ASME BPVC, Section VIII; EN 13445 (all parts).
3.13
rear closure
closure used at the return end of the heat exchanger which covers the u-bends
3.14
sealing ring

special gasket that provides a seal on the OD of tubesheet and the shell/tube side flange

2 © ISO 2012 – All rights reserved
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SIST EN ISO 12212:2012
ISO 12212:2012(E)
3.15
hairpin section
one U-tube element with two shell legs
3.16
seal-welded

tube-to-tubesheet joint weld of unspecified strength applied between the tubes and tubesheets for the sole

purpose of reducing the potential for leakage
3.17
strength-welded

tube-to-tubesheet joint welded so that the design strength is equal to, or greater than, the axial tube strength

specified by the pressure design code
3.18
structural welding code
recognized structural welding code specified or agreed by the purchaser
3.19
tube bundle

assembly of U-tubes, tube sheet and baffles where the tubes can be plain or finned

Key
1 shell 4 rear closure
2 front closure 5 tube side connection
3 support 6 shell side connection
Figure 1 — Typical components of a hairpin heat exchanger
4 General

 4.1 The pressure design code shall be specified or agreed by the purchaser. Pressure components shall

comply with the pressure design code and the supplemental requirements in this International Standard.

4.2 Where the use of TEMA is specified within this International Standard, the heat-exchanger construction

shall conform to TEMA, Class R, unless another TEMA class is specified.

4.3 Hairpin exchangers typically do not require expansion joints. However, it can be necessary to evaluate

some units to assess the requirement for an expansion joint. For such cases, the purchaser and vendor shall

agree to all relevant design, fabrication, inspection and testing requirements.
© ISO 2012 – All rights reserved 3
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SIST EN ISO 12212:2012
ISO 12212:2012(E)

 4.4 The vendor shall comply with the applicable local regulations specified by the purchaser.

4.5 Annex A includes recommended mechanical and design details for information.

4.6 Annex B provides a checklist that can be used by the purchaser to ensure that bulleted items in this

International Standard are addressed.

 4.7 The purchaser shall specify whether the service is designated as sour in accordance with ISO 15156

(all parts) for oil and gas production facilities and natural gas sweetening plants, or designated as wet

hydrogen sulfide service in accordance with NACE MR0103 for other applications (e.g. petroleum refineries,

LNG plants and chemical plants), in which case all materials in contact with the process fluid shall meet the

requirements of the applicable standard to mitigate potential for sulfide stress cracking (SSC). Identification of

the complete set of materials, qualification, fabrication and testing specifications to prevent in-service

environmental cracking is the responsibility of the user (purchaser).

NOTE For the purpose of this provision, NACE MR0175 is equivalent to ISO 15156 (all parts).

5 Proposal information required

5.1 The vendor's proposal shall include, for each heat exchanger unit, completed data sheets such as those

given in Annex C.

5.2 For components that are not fully identified by Clause 3, the vendor shall describe the details of

construction and assembly.

5.3 The proposal shall include a detailed description of all exceptions to the requirements of the purchaser's

inquiry.

5.4 For stacked heat exchangers, the vendor shall supply the following components unless otherwise

specified by the purchaser:
a) bolts, nuts and gaskets for interconnecting nozzles;
b) shims and bolting for interconnecting supports;
c) external, interconnecting tube side piping.

5.5 The vendor shall supply a recommended spare parts list for each hairpin heat exchanger.

6 Drawings and other required data
6.1 Outline drawings and other supporting data

6.1.1 The vendor shall submit, for review by the purchaser, outline drawings for each heat exchanger unit.

The drawings shall include the following information:

a) service, item number, project name and location, purchaser's order number, vendor's shop order number

and other special identification numbers;

b) design pressure, test pressure, maximum design temperature, minimum design metal temperature and

any restriction on testing or operation of the heat exchanger;

c) maximum allowable working pressure (MAWP) in the corroded condition and at the design temperature

for the shell side and tube side;

d) connection sizes, location, orientation, projection, direction of flow and, if flanged, the rating and facing;

4 © ISO 2012 – All rights reserved
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SIST EN ISO 12212:2012
ISO 12212:2012(E)
e) coupling sizes, rating and orientation;

f) dimensions, orientation and location of supports, including bolt holes and slots, and the stacking

arrangement;
g) overall dimensions of the heat exchanger;
h) tube bundle removal clearance;

i) mass of the heat exchanger, empty and full of water, and of removable components with a mass greater

than 25 kg (60 lb), (e.g. removable tube bundle, individual front closure and rear closure);

j) specified corrosion allowance for each side of the heat exchanger;
k) references to the applicable code and the purchaser's specification;
l) requirements for post-weld heat treatment;
m) requirements for NDE examination;
n) requirements for material impact testing;
o) requirements for surface preparation and painting;
p) gasket materials;
q) insulation thickness;

r) location and orientation of nameplates, lifting lugs, grounding clips or other attachments;

s) location of the centre of gravity of the exchanger for empty and full of water;

t) material specifications and grades for all components;
u) forces and moments on connections as specified by the purchaser;
v) tube-to-tubesheet joint welding and testing procedures.

6.1.2 The vendor shall recommend the tools required for the assembly and maintenance of the hairpin heat

exchanger. If torquing of bolts is required, the vendor shall provide torquing procedures.

6.1.3 The review of engineering documents by the purchaser shall not relieve the vendor of the

responsibility of meeting the requirements of the purchase order.
6.2 Information required after outline drawings are reviewed

6.2.1 Generic gasket information, including type and material, shall be provided.

6.2.2 Upon receipt of the purchaser's review comments on the outline drawings, the vendor shall submit

copies of all detailed (non-proprietary) drawings. These shall fully describe the heat exchanger and shall

include at least the following information:

a) full views and cross-sectional views including tube bundle details with dimensions and materials;

b) bundle details, including the following:
 tube layout,
© ISO 2012 – All rights reserved 5
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SIST EN ISO 12212:2012
ISO 12212:2012(E)

 number of baffles, type and description (for segmental baffles include cross-baffle cut, layout and

orientation in a view that shows the cut),
 details and locations of all sealing and sliding strips;

c) details of each pressure-retaining weld, including weld material, weld nominal thickness, weld location

and applicable non-destructive examination method;

d) details of each weld and weld nominal thickness for non-pressure attachments welded to pressure parts

and for all load bearing attachments;

e) complete bills of materials, including the material specifications and part numbers for all proprietary

components;
f) details of cladding and weld overlay;

g) details of tube-to-tubesheet joints, including procedures for installation, welding, expansion, inspection

and testing;
h) flange-face finish.

 6.2.3 If specified by the purchaser, the vendor shall furnish copies of applicable welding procedure

specifications, procedure qualifications and weld map for review or record.

 6.2.4 The purchaser shall specify whether the vendor shall furnish for the purchaser's review or record the

following documentation:

a) mechanical design calculations for shell thickness, tube thickness, nozzle reinforcement and other non-

proprietary pressure-retaining components. If calculations are made using computer softward, all input

and output data shall be detailed so as to facilitate an understanding of the calculation procedures. The

equations in the applicable sections of the pressure design code and TEMA shall be referenced;

b) minimum required thicknesses for all pressure-retaining components, whether they are proprietary or

non-proprietary;
c) maximum allowable working pressure calculations (MAWP);

d) design calculations based on seismic, wind, transportation and/or piping loads, if these loads are provided

by the purchaser;
e) proposed procedures for assembly of flanged joints. Any requir
...

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