3 - HDPE - ITP PIPE WELDING.docx

COMACOE FIELD INSPECTION AND TEST PLAN FOR HDPE PIPE WELDING CUSTOMER : GAYATRI PROJECTS OWNER:THERMAL POWER TECH LIMITED CORPORATION INDIA LTD PROJECT : 2X660 MW TPCIL PH# 1, 2X660 MW, Thermal Power Plant at Krishnapatnam, Andhra Pradesh, India PACKAGE/SYSTEM : SWIO HDPE PIPE WELDING. SL.N O 1.

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DESCRIPTION OF ITEM/OPERATI ON /STAGE HDPE Pipes & fittings incoming inspection

Trial welding

Production Welding of Pipe to Pipe and Pipe to stub end .

CHARACTERISTIC S

TYPE/ METHOD OF CHECK

EXTE NT OF CHEC K

REFERENCE DOCUMENT S

Surface finish of pipes& fittings at the stock yard on receipt from supplier

Visual & Measureme nt

100%

ISO 4427 & specification

Drag Force, temperatures, time periods, welding pressure

Recording of weld parameters

100%

Manufacture rs catalogue, Preliminary WPS

a Ovality adjustment prior to welding

measureme nt

100%

Inspection report

b Drag force Visual &

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Approved trail welding

ACCEPTAN CE NORMS

FORMA T OF RECORD

FITP NO : QAPC/CM110809060104 REV.NO : 03 DATE : 08.12.2011

COMAC OE

GP L

TPC IL

Cuts and transportati on damages not more than 10% of wall thickness. Adherence to welding parameter ranges.

Inspectio n report

P

W

W

Weld log sheet

p

W

W

Shall Not more than ± 10% of wall thickness Not more than of welding

Manual Weld log

p

W

RW

Weld Log sheet & Inspectio

P

W

RW

REMARKS

Comparison data logger & manual recording of parameters.

Field observation.

COMACOE TPCIL

GPL-EPC-PP

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