Welding Procedure Specification.xlsx

	B	C	D	E	F	G	H	I	J	K
1	Welding Procedure Specification
2	Welding Procedure Specification
3	Client:	Raa One Construction & Engineering Pte Ltd.			Project:	CCS Tengah			Ref No.	WPS 1
4	Procedure Description:		Roof Top carbon steel Pipe Welding
5	Material:	Carbon Steel pipe HSC 40 / NPS 200 / 150 /80				Diameter:	200 mm		Thickness:	19 mm
6	Position:	6G				Clamp Type:	Internal
7	Preheat °C (Min):		Ambient			Interpass °C (Max):		300°C
8			ROOT			HOT PASS			FILL & CAP
9	Welding Process		SMAW			SMAW			SMAW
10	Welding Direction		Vertical up			Vertical up			Vertical up
11	Filler		KOBELCO LB - 52			KOBELCO LB - 52			KOBELCO LB - 52
12	Polarity		AC, DC-EP			AC, DC-EP			AC, DC-EP
13	Sheilding Gas		N/A			N/A			N/A
14	purge Gas		N/A			N/A			N/A
15	Pass No.	Filler Size (mm)	Amps	Volts	Speed (mm/sec)	Heat Input (KJ/mm)	Weld Preparation
16	1	2.6	50-80	20-22	2.2 - 3.4	0.3 to 0.5
17	2	3.2	80-120	22-25	3.4 - 6.5	0.5 to 0.8
18	3	3.2	80-120	22-25	3.4 - 6.5	0.5 to 0.8
19	4	3.2	80-120	22-25	3.4 - 6.5	0.5 to 0.8
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23	NOTES						Pass Location
24	1. After tacking operation you must check the alignment of two piece with Angle scale. 2. Grinding or cleaning operation after every welding round to remove extra material. 3.Time lapse betwee root pass and fill pass is 16 minutes. 4. fill pass time araange the current as per requirement. 5. Time lapse between second pass and third pass will be 12 minutes. 6. After the completion of welding must chekck the cap starting and ending should be overlaped each other.
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39	Bintai Welding …............................................................. Engineer Approved					Approved for SDC ….............................................................
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