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    AP-GSME-CP-004 Lowering & Backfilling Procedure

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    gamadraft

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    AP-GSME-CP-004 Lowering & Backfilling Procedure

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    gamadraft
    16 views8 pages

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    Copyright:

    © All Rights Reserved
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    Download as pdf or txt
    16 views8 pages

    AP-GSME-CP-004 Lowering & Backfilling Procedure

    Uploaded by

    gamadraft

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 8

    Lowering & Backfilling Procedure

    Document No.: AP-GSME-PL-CP-004 Total Page 8 Sheet

    CLIENT : PT. AIR PRODUCT INDONESIA

    CONTRACTOR : PT. GREGAH SUKSES MANDIRI ENGINEERING

    PROJECT NAME : SMIP Offsite Project

    LOCATION : Sei Mangkei Industrial Park, Bosar Maligas,

    Simalungun, North Sumatera,

    JOB NO. : EN-24-1187

    0 8/5-24 OT CHY CHY

    REV DATE DESCRIPTION Prep Check App Rev Check App

    PT. GSME PT. AP

    1
    TABLE OF CONTENTS

    Tittle Page

    1. General ...................................................... Error! Bookmark not defined.


    1.1. Purphose .......................................... Error! Bookmark not defined.
    1.2. Scope of work ................................. Error! Bookmark not defined.
    2. Reference .................................................. Error! Bookmark not defined.
    3. Manpower & Equipment .......................... Error! Bookmark not defined.
    3.1. Manpower ...................................... Error! Bookmark not defined.
    3.2. Equipment ....................................... Error! Bookmark not defined.
    3.3. Safety Equipment ........................... Error! Bookmark not defined.
    3.4. Lowering & Backfilling equipment Error! Bookmark not defined.
    4. Work Methode .......................................... Error! Bookmark not defined.
    4.1. Lowering work ................................................................................4
    4.2. Preparation ...................................... Error! Bookmark not defined.
    4.3. Implementation .............................. Error! Bookmark not defined.
    4.4. Back filling work ............................... Error! Bookmark not defined.
    4.4.1 Preparation ................................. Error! Bookmark not defined.
    4.4.2 Implementation ……………………………………………………..Error!
    Bookmark not defined.

    5. Inspection & Documentation .................. Error! Bookmark not defined.


    5.1. Lowering ..........................................................................................7
    5.2. Backfilling .........................................................................................7
    6. HEALTH, WORK SAFETY & ENVIRONMENTAL PROTECTION ............................. 8

    2
    1. GENERAL

    1.1. PURPHOSE

    The purpose of this procedure is to describe the Lowering and Backfilling work
    method that will be carried out correctly and using materials that comply with
    the specified requirements..

    1.2. SCOPE OF WORK

    This document covers the requirements that must be carried out for pipe
    lowering and pipe filling work for Nitrogen pipe and Hydrogen pipes.

    2. REFRENCE

    • ASME B31.8, Gas Transmission and Distribution Piping System.


    • API 1104L, Specification for Line Pipe.
    • Kepmen No 300.K/38/M.PE/1997, Keselamatan Kerja Pipa Penyalur Minyak
    dan Gas Bumi.
    • SNI 13-3474 Sistem Perpipaan Transmisi dan Distribusi Gas

    3. MANPOWER & EQUIPMENT

    3.1. Manpower

    List of labor and quantity of labor involved in lowering dan backfilling :

    a. Constructionn Manager = 1 person


    b. Supervisor = 1 person
    c. QA/QC Inspector = 1 person
    d. Operator Lowering dan Backfilling = 20 person
    e. HSE Officer = 1 person

    3
    3.2. Equipment

    • Transportation Car = 2 unit


    • Tripod 1 Ton = 5 unit
    • Chain Block 1 Ton = 5 unit
    • Shackles 1 Ton = 5 unit
    • Sling Belt 1,5 Ton = 5 unit

    3.3. SAFETY EQUIPMENT

    - Personal protective equipment ( PPE ) = 24 set


    - first aid box = 1 unit
    - Fire Extingusher = 3 unit
    - Warning Sign = 2 unit
    - Safety Line = 2 unit
    - Safety Cone = 2 unit
    - Barricade = 1 roll

    3.4. LOWERING & BACFILLING EQUIPMENT

    - hoe, = 20 unit
    - Stamper = 1 unit

    4. Work Methode

    4.1. Lowering work

    Lowering Methodology using a Tripod,


    1. Pipe strangling manually in an area that has been determined
    according to the area that will be installed after excavation, the pipe is
    continued to be connected using the welding method and lifted using
    a tripod to position it in the excavation area
    2. Install Sand Bag for support pipe every 6m
    3. Make sure the elevation same as drawing

    4
    4. Fill in excavation with sand Thickness 10cm before lowering pipe
    5. The area is ready with support sand bags.
    6. The pipe is ready to be treated for lowering work.

    4.2. Preparation

    Preparation for Lowering work includes the following stages:

    • Ensure that the excavation dimensions are in accordance with the


    trenching procedure.

    • Ensure that the excavation depth refers to the requirements and the
    implementation refers to the As-Built Survey Procedure.

    • Make sure the minimum Depth Cover is 1.8 meters from the Top of Pipe.

    • Make sure all equipment to be used is in good and adequate


    condition.

    • Coordinate with related agencies regarding area arrangements.

    • Make sure the Free Span distance is within the Free Span tolerance
    limit.

    • Ensure Pipeline Lowering analysis has been carried out and approved
    before Lowering work begins.

    • Make sure the bottom of the excavation is free from rocks or other hard
    objects that could damage the pipe wrapping.

    • For rocky excavation areas, the bottom of the excavation must be


    filled with sand (conditional).

    • Make sure each pipe connection to be lowered has passed NDT.

    • Ensure that all pipes that will be lowered into the excavation have
    passed the holiday test.

    5
    • If there is standing water in the excavation, dewatering is carried out
    first before lowering work.

    4.3. Implementation

    • The pipe lowering process must use a sling belt so as not to damage
    the protective layer of pipe wrapping.

    • Pipe lowering process using a tripod and chain block.

    • To avoid stress on the pipe, make sure the tripod is in the correct and
    safe position when lowering the pipe.

    • Carry out an As-Built Survey by measuring according to references that


    can be used as a reference

    • Carry out a Free Span inspection, if there is still a free span that exceeds
    the calculation limit, a sandbag will be installed between the free span.

    • At the ends of the pipe segments, covers are installed to prevent


    damage and dirt during mobilitation, stacking / storage, stringing, and
    placement in the installation position.

    4.4. BACKFILLING WORK

    4.4.1. Preparation

     Ensure that the material to be used for backfilling is available and


    meets the approved specifications.
     Ensure that all equipment that will be used for the backfilling
    process is available and suitable for use.
     Make sure there is no equipment left in the excavation before
    backfilling work is carried out.

    6
    4.4.2. Implementation

     Carry out backfilling work gradually and evenly from the top

    of the pipe.

     After backfilling, compact it using a stamper gradually.

     Backfilling work continues with the installation of Marker

    Tape at a distance of 50 cm from the Top of Pipe.

     Compact using a stamper, until it reaches sufficient

    density.

    5. Inspection And Documentation

    5.1. LOWERING

    Inspection of lowering should include the following :

    - Min Depth of Cover pipe

    - Distance of pipe to excavation wall

    - Straightness of pipe

    - As-Built

    5.2. BACKFILLING

    Several things that need to be done and paid attention by Supervisors

    and QA / QC Inspectors in the field are as follows:

    • Ensure that the backfilling work process is carried out with the right materials
    and methods in accordance with established procedures.
    • The completed backfilling must be in its original condition and have good
    density.
    • Make daily work reports and report to Supervisor.
    • Backfill materials
    • Installation of marker tape

    7
    • Compaction of each layer

    6. HEALTH, WORK SAFETY & ENVIRONMENTAL PROTECTION

    Things that must be considered regarding Health, Work Safety and Environmental
    Protection include:

    • Before carrying out activities in the field, a safety talk is conducted first led by
    the HSE team.
    • Safety and health procedures for excavation work must refer to the
    Occupational Safety, Health and Environmental Management (K3PL)
    Procedure Document
    • must use equipment and tools that have been inspected and are fit for use.
    • Ensure Personal Protective Equipment is always used.

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