20.104 Construction of Steelwork

of 52

  • date post

    06-Jul-2018
  • Category

    Documents

  • view

    214
  • download

    0

Embed Size (px)

Transcript of 20.104 Construction of Steelwork

  • 8/17/2019 20.104 Construction of Steelwork

    1/52

    PETRON S

    TECHNIC L ST ND RDS

    DESIGN AND ENGINEERING PRACTICE

    TECHNICAL SPECIFICATION

    CONSTRUCTION OF STRUCTUR L

    STEELWORK

    PTS 20 104

    APRIL 1989

    PETRON S

  • 8/17/2019 20.104 Construction of Steelwork

    2/52

    PREF CE

    PETRONAS Technical Standards (PTS) publications reflect the views, at the time of publication,

    of

    PETRONAS OPUs/Divisions.

    They are based

    on

    the experience acquired during the involvement with the design, construction,

    operation

    and

    maintenance

    of

    processing units and facilities. Where appropriate they are based

    on, or reference

    is

    made to, national and intemational standards and codes

    of

    practice.

    The objective is

    to

    set the recommended standard for good technical practice to be applied by

    PETRONAS OPUs

    in

    oil and gas production facilities, refineries, gas processing plants, chemical

    plants, marketing facilities or any other such facility, and thereby to achieve maximum technical

    and economic benefit from standardisation.

    The information set forth in these publications is provided

    to

    users for their consideration and

    decision to implement. This is of particular importance where PTS may not cover every

    requirement or diversity

    of

    condition at each locality. The system of PTS

    is

    expected to

    be

    sufficiently flexible to allow individual operating units to adapt the information set forth n

    PTS

    to

    their own environment and requirements.

    When Contractors or Manufacturers/Suppliers use PTS they shall be solely responsible for the

    quality

    of

    work and the attainment

    of

    the required design and engineering standards.

    n

    particular, for those requirements not specifically covered, the Principal will expect them to follow

    those design

    and

    engineering practices which will achieve the same level of integrity as reflected

    in the PTS. If in doubt, the Contractor or Manufacturer/Supplier shall, without detracting from his

    own responsibility, consult the Principal or Its technical advisor.

    The right to use

    PTS

    rests with three categories

    of

    users :

    1 PETRONAS and Its affiliates.

    2) Other parties who are authorised

    to

    use

    PTS

    subject to appropriate contractual

    arrangements.

    3) Contractors/subcontractors and Manufacturers/Suppliers under a contract with

    users referred to under 1) and 2) which requires that tenders for projects,

    materials supplied or - generally - work performed

    on

    behalf

    of

    the said users

    comply with the relevant standards.

    Subject to any particular terms and conditions as may be set forth in specific agreements with

    users, PETRONAS disclaims any liability

    of

    whatsoever nature for any damage (Including Injury

    or

    death) suffered by any company

    or

    person whomsoever as a result

    of

    or in connection with the

    use, application or implementation of any PTS, combination of PTS or any part thereof. The

    benefit

    of

    this disclaimer shall Inure

    n

    all respects to PETRONAS and/or any company affiliated

    to PETRONAS that may Issue PTS

    or

    require the use

    of

    PTS.

    Without prejudice to any specific terms n respect

    of

    confidentiality under relevant contractual

    arrangements,

    PTS

    shall not, without the prior written consent

    of

    PETRONAS, be disclosed by

    users to any company or person whomsoever and the PTS shall be used exclusively for the

    purpose they have been provided to the user. They shall be returned after use, Including any

    copies which shall only

    be

    made by users with the express prior written consent

    of

    PETRONAS.

    The copyright of

    PTS

    vests

    n

    PETRONAS. Users shall arrange for PTS to be held

    n

    safe

    custody and PETRONAS may

    t

    any time require Infonnatlon satisfactory to PETRONAS

    n

    order

    to ascertain how users Implement this requirement.

  • 8/17/2019 20.104 Construction of Steelwork

    3/52

    T BLE OF

    CONTENTS

    1.0 GENERAL

    1 1 Scope

    1.2 Performance

    f

    Work

    1.3 Errors

    And

    Omissions

    1.4 Referenced Documents

    1.5 Documentation

    1.6 Glossary

    1.7 Abbreviations

    2.0 MATERIALS

    2 1 General

    2 2

    Weldable Structural Steel

    And

    Steel Products

    3.0 WELDING

    3 1 General

    4.0 WELDING CONSUMABLE

    4 1

    Types Of Electrodes Wires

    And

    Fluxes

    4.2 Conditions And Storage

    4.3 Heating

    And

    Baking Requirements

    5 0

    QUALIFICATION OF WELDING PROCEDURE

    5 1 General

    5 2

    Parameters

    In

    Welding Procedure Specification

    5 3

    Welding Procedure Qualification Test

    5.4 Essential Variables In Qualification Of Welding Procedures

    5 5

    Procedure Qualification Record

    5 6 ~ ~ o Permitted Welding Processes

    5 7

    Testing Requirements For Procedural Qualification Test

    5 8

    Acceptance Criteria

    5 9 Retest

    6.0 QUALIFICATION OF WELDERS AND WELDING OPERATORS

    6 1 General

    6 2

    Qualification Test For SMAW with Covered Eiectrodes

    7.0 PRODUCTION WELDING

    7 1

    General

    7 2 Welding Sequence

    7.3 Weld Preparations

  • 8/17/2019 20.104 Construction of Steelwork

    4/52

    7.4 Weld Execution

    7.5 Preheating And Interpass Temperatures

    7.6 Stress Relieving - Post Weld Heat Treatment

    8.0 FABRICATION

    8 1

    General

    8.2 Material Preparation

    8.3 Forming Of Tubular And Cones

    8.4 Spacing of Seams And Splices

    8.5 Laying-Out Alignment And Fit-up

    8.6 Temporary And Non-Structural Attachments And Cut-Outs

    8.7 Finishing Of Surfaces

    8.8 Repair And Remedial Procedures

    8.9 Ancillaries And Temporary Works

    9.0 TOLERANCES

    9 1

    General

    9.2 Local Tolerances For Structural Components And Sub-Assemblies

    9.3 Global Tolerances For The Completed Structure

    9.4 Miscellaneous Structural Tolerances

    9.5 Launchways

    10.0 INSPECTION AND TESTING

    10 1

    General

    10.2 Personnel

    10.3 Testing Of Welds

    10 4 NOT Reporting Requirements

    11.0 PLACING DRAWINGS

    12.0 AS-BUILT DRAWINGS

  • 8/17/2019 20.104 Construction of Steelwork

    5/52

    1 0 GENERAL

    1 1

    Scope

    a This specification shall govern the material specifications, shop and field welding

    fabrication and inspection requirements of all structural steel for the Works,

    i.e.

    i

    Platform support structures

    Uackets,

    piles etc)

    ii) The deck, whether constructed of plate girders, box girders or tubular frames,

    and

    all associated support structures in or

    on the

    deck, access

    and

    protection

    steelwork e.g stairways, walkways

    and

    handrails,

    and

    bridges

    iii) Deck to substructure connection

    iv) Structural steel

    in

    or on

    the

    substructure, such as J-tubes, subsea pipeline

    bridges, manifold jackets

    and

    supports for e.g piping, process equipment,

    electrical equipment, instrumentation equipment, etc

    v) Jetties

    vi) Steel skirt to foundation if any)

    b

    The

    Contractor shall supply

    all

    steel, materials, labour, tools, equipment and services

    and

    perform or arrange

    all

    tests specified or necessary unless speCifically directed

    otherwise

    in

    the contract)

    to

    ensure that the requirements of this SpeCification are

    fulfilled and to ensure proper functioning of components.

    c

    Where it is necessary for certain structural steel components to be installed offshore,

    compliance with

    all

    the requirements of this Specification shall also mean that such

    component shall be trial assembled onshore to ensure subsequent correct fit, whenever

    directed by the Company.

    d

    The

    Contractor shall satisfy himself

    as

    to the details of the scope and requirements

    in

    the contract and shall be deemed to have included for the above stated and all that

    follows

    in

    this section

    o

    the SpeCification.

    e

    This

    SpeCification

    covers the material selection and welding of mild steels

    with

    yield

    strengths of less than or equal

    to

    52,000

    psi as

    defined in the relevant material

    speCification.

    1 2 Performance

    f

    Work

    a

    The Contractor shall have in charge of the

    work,

    at

    all

    times, a thoroughly competent