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PRELIMINARY WELDING PROCEDURE SPECIFICATION (Pwps)DIALOG TOWER, No. 15, Jalan PJU 7/5, Mutiara Damansara, 47810 Petaling Jaya, Selangor Darul Ehsan, Malaysia

Welding Procedure Specification :Method of Preparation and Cleaning :WPQR No. :Parent Material Designation : Group 1Welder's Name :Material Thickness (mm) :40 mm Mode of Metal Transfer :N/AJoint Type and Weld Type :Double VWelding Position :1GOutside Diameter (mm) : N/A Weld Preparation Details (Sketch) :Joint DesignWelding Sequences

Welding DetailsRunWelding ProcessSize of Filler MaterialCurrent AVoltage VType of Current/ PolarityWire Feed Speed (mm/min)Travel Speed (mm/min)Heat Input, (KJ/mm)121212121121 (SAW)4N/A700N/A29N/AACN/A7203.442121 (SAW)4N/A750N/A29N/AACN/A8003.433121 (SAW)4N/A750N/A29N/AACN/A8003.434121 (SAW)4N/A750N/A29N/AACN/A8003.435121 (SAW)4N/A750N/A29N/AACN/A8003.436121 (SAW)4N/A750N/A29N/AACN/A8003.43

Filler Material Any Special Baking or Drying :12Filler Metal DesignationEH12KN/AFlux DesignationF7P8 N/AFiller Metal Brand and Trade NameESAB OK Autrod 12.32N/AFlux Brand Trade NameESAB OK Flux 10.62N/AWire Flux ClassificationF7P8-EH12KN/ADesignation Gas/Flux - Shielding :N/AN/AOther information* e.g. : - Backing :N/AN/AWeaving (max. width of run) :N/AGas Flow Rate - Shielding :N/AN/AOscillation :amplitude, frequency, dwell time :N/A - Backing :N/AN/APulse welding details :N/ATungsten Electrode Type/Size :N/AN/ADistance contact tube/ workpiece :N/ADetails of Back Gouging/Backing :N/AN/APlasma welding details :N/APreheat Temperature :Torch angle :20Interpass Temperature :Post-Weld Heat Treatment and/or Ageing : :YesPost-Heating :(Time, Temperature, Method) :1hour , 550-600 , BurnerPre-heat Maintenance Temperature :(Heating and Cooling Rates) :137.5 C/h

DIALOG Name, date and signature

*Provide 200 mm width length from weldment for NDT purpose