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METHOD STATEMENT
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GENERAL INFORMATION
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METHOD STATEMENT
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METHOD STATEMENT FOR insulation of
chilled water pipe work and
ancillaries
Project : *INSERT PROJECT NAME HERE
MEP Contractor : *INSERT CONTRACTOR NAME HERE
Document No. :
Document revision status : 1
1 05-24-2008 Issued for Review & Comments
Prepared by Checked by Approved by
Rev. Date Description
*INSERT CONTRACTOR HERE
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METHOD STATEMENT
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REVISION CONTROL SHEET
REV. NO. DATE PAGE NO. DESCRIPTION
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METHOD STATEMENT
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TABLE OF CONTENTS
1. Introduction………..……………………………………………………………….. 4
2. Reference..………………………………………………………………………….. 4
3. General………………………………………………………………….…………….. 4
4. Responsibilities....………………………………………………………………….. 5
5. Materials Handling and Storage at Site..……………………………………….. 5
6. Tools and Equipments..……......…………………………………………………… 6
7. Work Instruction...….………………………………………………………………… 6
8. Procedures.………………………………………………………………………….… 6
9. Insulation Type……………………………………………………………………….. 7
10. Preparation and Installation……………………………………………………… 7-8
11. Safety……………………………………………………………………………………. 9
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METHOD STATEMENT
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1. INTRODUCTION :
This method statement deals with insulation of CHILLED WATER PIPE WORK
AND ANCILLARIES ( above ground ). Before commencement of insulation
activities, all Insulation material must be conform to approved shop drawings and
material submittals.
The purpose of this document is to define the procedure for the above-mentioned
work. The implementation of correct practice for the insulation of Chilled Water
Pipe Work and Ancillaries through the general procedures contained herein.
2. REFERENCE
2.0 Contract Specification Section 230719 – Pipe Insulation
Related Section :
Section 220525 – Hangers and Supports
Section 231123 – Equipment Insulation
3. GENERAL
The insulation of pipe work and ancillaries will be achieve in accordance with
requirement of the local codes, manufacturer’s recommendation as per the
material submittal and the following international codes.
3.0
3.1
3.2
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METHOD STATEMENT
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4. RESPONSIBILITIES
4.0 All works associated with the above-mentioned project to the supply and
installation of Chilled Water Pipe Work and Ancillaries, will be the
responsibilities of the sub-contractor (*INSERT CONTRACTOR NAME HERE) in
accordance with the
contract documents.
4.1 *INSERT CONTRACTOR NAME HEREresponsibilities for the particular personnel are
as follows :
4.1.0 Project manager will have the overall responsibility for the execution
of the mechanical works.
4.1.1 The Planning Engineer will be responsible for the onward planning
requirements associated with the works the submission to Main
Contractor of all related Projects Plan.
4.1.2 The Senior Mechanical Engineer will be responsible for the technical
aspect of work.
4.1.3 The Site Mechanical Engineer will be in-charge for the execution of
work at site.
4.1.4 The QA/QC Engineer will be responsible for the quality control of
insulation of works and verification of installed material including
documentation and inspection.
5. MATERIALS HANDLING AND STORAGE AT SITE
5.0 All insulation of Chilled Water Pipe Work and Ancillaries shall be carefully
off-loaded at site using necessary work force/ shifting machinery/ equipment
to ensure that no damage is caused to the materials.
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METHOD STATEMENT
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5.1 All materials shall be stored in a clean , dry place and adequate cover shall
be provided to avoid damages.
5.2 Materials shall be shifted to workplace from storage area with the help of
sufficient manpower and equipment if required.
6. TOOLS AND EQUIPMENT
6.0 Measuring Tape
6.1 Cutting Tools
6.2 Riveting Machine
6.3 Electrical Drill Machine ( Portable )
6.4 Electrical Supply :
6.4.0 Flood Light
6.4.1 Extension Cord / Wire
6.4.2 Junction Boxes & Switch Boxes to be supply by Main Contractor.
6.4.4 Provision of Power Supply by Main Contractor.
6.5 Erection Scaffolding ( 2 meters Height )
6.6 Mobile Scaffolding / Normally Ladder for pipe work use.
7. WORK INSTRUCTION
The installation works will carried out strictly in accordance with the contract
Documents and specification.
8. PROCEDURES
8.0 General Requirements
8.0.0 Insulation Materials
8.0.1 Adhesives
8.0.2 Adhesive Tapes
8.0.3 Fixing Pins, Clips, & Speed Washer
8.0.4 Canvas Cloth
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8.0.5 Coating
8.0.6 Aluminum Cladding if Required
8.0.7 Rivets & Metal Screw
9. INSULATION TYPE
The type of insulation has been classified as fiberglass as AFICO fiberglass
perform snap-on extra rigid pipe section as per relevant specification of ASTM
and BS standards. AFICO K-450 with factory applied glass reinforced flame
retardant aluminum foil jacket laminated on one side. The insulation comply
with Fire Classification per BS 476 ( Part 4 ) ASTM E-84, E-136.
9.0 SPECIFICATION OF PREFORMANCE INSULATION
9.0.0 AFICO fiberglass preformed rigid pipe insulation K-450 as manufactured
Saudi Arabia Insulating Materials Manufacturing Co. ( AFICO).
9.0.1 Density of 4 ib/cu ft. (64 kg. /cu. m. ) and with a K – factor of 0.21
BTU in. /sq. ft. hr. F ( 0.030 W/m. K) at a mean temperature of 77 deg.
F ( 25 deg. C).
9.0.2 Fire Classification as per BS 476 ( Part 4 ), ASTM E- 84 and E- 136 as
non-combustible material. The glass reinforced aluminum foil/Kraft
laminating facing (FSK) are UL classified as flame spread = 5 and
smoke developed =0.
9.0.3 Vapor permeance of 0.00279 perms . 40 mm thick . ( Applicable to
Interior building ) & 50 mm thick . ( Applicable to exterior building –
exposed to ambience temperature ) and supplied to standard length
size of 1200 mm.
10. PREPARATION AND INSTALLATION
10.0 On successful completion of pressure testing of pipes , a mock-up
installation work will be carried out and approval will be obtained from
Company / TPI.
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10.1 All insulation work will be carried out in accordance with the approved
manufacturer’s recommendation.
10.2 The external surface of pipe should be clean thoroughly and made
free of dust , oil and grease etc. before application of adhesive.
10.3 Adhesive shall then be applied to surface of pipe strictly according to
manufacturer’s recommendation. The type of adhesive shall be the
approved specification section 230713 – Duct Accessories.
10.4 The insulation shall be placed on the pipes and longitudinal overlap
Sealed with a 75 mm wide vapor barrier seal strips adhered neatly in
place with a vapor barrier adhesive and /or self-adhesive aluminum
tape. Bend shall have insulation with mitered segments of
insulation.
10.5 The joint shall have close butted together and sealed with a 50 mm
wide self adhesive aluminum tape.
10.6 Fitting and valves shall be insulated with molded fittings /mitered
segments of pipe insulation or 0.45 kg. Density of fiberglass blanket
compressed 2 to 1 secure with self adhesive aluminum tape. The
thickness of insulation shall be the same as adjoining insulation.
10.7 Flange shall have section pipe insulation extending a minimum of 25
mm beyond the end of the bolts. Bolt area shall have filling of
insulation material and adhesive.
10.8 All pipes / fittings shall be finish with canvas cloth smoothly adhere
and coated with lagging adhesive.
10.9 The cladding shall be formed true to shape and secured around the
insulation with the self tapping screw or rivets at center not more
than 150 mm or as required.
10.10 The longitudinal overlap of cladding shall be at least 40 mm and the
circumferential overlap shall be at least 50 mm. All joints shall be
lapped to shed the water and the joints sealed thoroughly against
moisture. Bends fittings shall have covering to match aluminum
cladding , tailored to fit and appropriately sealed.
10.11 Pre – fabricated purpose designed boxes shall be used to cover
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Valve and flanges.
10.12 Pipe sleeves provided for pipes penetrating floor slabs, walls and
partitions . The insulation carried through the pipes sleeves and the
gap between the sleeves and the insulation packed with rigid loose
fiberglass and sealed with adhesive/ mastic.
10.13 Anodized aluminum sheet or galvanized metal escutcheons
provided both sides of walls exposed to view. The escutcheon
inside diameter shall closely fit to pipe insulation and making a good
finish.
10.14 Insulation pipe hanger shield or saddle shall be installed at hangers.
at the point of support, a wooden insert incased in a sheet metal
shield / saddle protect insulated pipe.
10.15 The insert material and applied insulation shall be tightly joining the
insert. Seal insulation to insulation insert with adhesive or sealing
compounded recommended by the insulation materials
manufacturer.
10.16 Care to consider during the installation ensuring the integrity of
vapor barrier throughout the brackets, supports, and penetration
where vapor barriers indicated.
11. SAFETY
11.0 All installation / construction work will be undertaken in accordance
With Health, Safety, and Environment Plan P- 1215-3-501 and
P-1215-3-502.
11.1 All site personnel shall be provided with necessary personal safety
protective gadget like the hard hat , pair of safety shoes & gloves,
safety belt & goggles and shall be worn at all times if required on
site.
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11.2 All site work activities will be kept in a clean and tidy condition.
----------------------------Procedure Ends---------------------
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