SSAW Pipe / SAWH Pipe

Spiral Submerged Arc Welded (SSAW) Pipe
Submerged Arc Helical Welded (SAWH) Pipe
 
Spiral Submerged Arc Welded (SSAW) Pipe is also named Submerged Arc Helical Welded (SAWH) Pipe. SSAW pipe is a kind of tubular product having one helical seam produced by the submerged-arc welding process.
 
Spiral Submerged Arc Welded Pipe (SSAW) is mainly used in oil & natural gas, shale gas, ore slurry transportation, tap water, sewage, heating network reconstruction and other projects, and it is also widely used in piling, bridges, steel structures, etc.
 
Size
Diameter: Ф219.1~Ф3500mm (8.62"-138")
Wall thickness: 6.3~25.4mm (1/4"-1")  
Steel Grade
Pipeline steel: B~X80 (API 5L), L245~L555 (GB/T 9711)
Carbon steel: Q235~Q460

SSAW Pipe / SAWH Pipe Manufacturing Process Flowchart
Applied Standards
API Spec 5L (46 edition) Specification for Line Pipe
GB/T 9711-2017 Petroleum and natural gas industries—Steel pipe for pipeline transportation systems
GB/T 3091-2015 Welded steel pipes for low pressure liquid delivery
SY/T 5037-2018 Spiral submerged arc welded steel pipe for pipelines for low pressure fluid service
SY/T 5040-2012 Welded steel pipe piles
Other standards of similar products and other higher standards (DNV, ISO, DEP, EN, ASTM, DIN, BS, JIS, GB, CSA, etc.)

Chemical composition and mechanical properties of Spiral Steel Pipe (SSAW or SAWH)

Chemical composition and mechanical properties of Spiral Steel Pipe (SSAW or SAWH)

Standard	Grade	Chemical Composition(max)%					Mechanical Properties(min)
		C	Si	Mn	P	S	Tensile Strength (Mpa)	Yield Strength (Mpa)
API 5CT	h40	–	–	–	–	0.03	417	417
	J55	–	–	–	–	0.03	517	517
	K55	–	–	–	–	0.03	655	655
API 5L PSL1	A	0.22	–	0.9	0.03	0.03	335	335
	B	0.26	–	1.2	0.03	0.03	415	415
	X42	0.26	–	1.3	0.03	0.03	415	415
	X46	0.26	–	1.4	0.03	0.03	435	435
	X52	0.26	–	1.4	0.03	0.03	460	460
	X56	0.26	–	1.4	0.03	0.03	490	490
	X60	0.26	–	1.4	0.03	0.03	520	520
	X65	0.26	–	1.45	0.03	0.03	535	535
	X70	0.26	–	1.65	0.03	0.03	570	570
API 5L PSL2	B	0.22	0.45	1.2	0.025	0.015	415	415
	X42	0.22	0.45	1.3	0.025	0.015	415	415
	X46	0.22	0.45	1.4	0.025	0.015	435	435
	X52	0.22	0.45	1.4	0.025	0.015	460	460
	X56	0.22	0.45	1.4	0.025	0.015	490	490
	X60	0.12	0.45	1.6	0.025	0.015	520	520
	X65	0.12	0.45	1.6	0.025	0.015	535	535
	X70	0.12	0.45	1.7	0.025	0.015	570	570
	X80	0.12	0.45	1.85	0.025	0.015	625	625
GB/T 9711.1	L210	–	–	0.9	0.03	0.03	335	335
	L245	–	–	1.15	0.03	0.03	415	415
	L290	–	–	1.25	0.03	0.03	415	415
	L320	–	–	1.25	0.03	0.03	435	435
	L360	–	–	1.25	0.03	0.03	460	460
	L390	–	–	1.35	0.03	0.03	490	490
	L415	0.26	–	1.35	0.03	0.03	520	520
	L450	0.26	–	1.4	0.03	0.03	535	535
	L485	0.23	–	1.6	0.03	0.03	570	570
GB/T 3091 /  SY/T 5037	Q195	0.12	0.3	0.5	0.035	0.04	315	315
	Q215B	0.15	0.35	1.2	0.045	0.045	335	335
	Q235B	0.2	0.35	1.4	0.045	0.045	370	370
	Q345B	0.2	0.5	1.7	0.035	0.035	470	470
ASTM A53	A	0.25	0.1	0.95	0.05	0.045	330	330
	B	0.3	0.1	1.2	0.05	0.045	415	415
ASTM A252	1	–	–	–	0.05	–	345	345
	2	–	–	–	0.05	–	414	414
	3	–	–	–	0.05	–	455	455
EN10217-1	P195TR1	0.13	0.35	0.7	0.025	0.02	320	320
	P195TR2	0.13	0.35	0.7	0.025	0.02	320	320
	P235TR1	0.16	0.35	1.2	0.025	0.02	360	360
	P235TR2	0.16	0.35	1.2	0.025	0.02	360	360
	P265TR1	0.2	0.4	1.4	0.025	0.02	410	410
	P265TR2	0.2	0.4	1.4	0.025	0.02	410	410
EN10217-2	P195GH	0.13	0.35	0.7	0.025	0.02	320	320
	P235GH	0.16	0.35	1.2	0.025	0.02	360	360
	P265GH	0.2	0.4	1.4	0.025	0.02	410	410
EN10217-5	P235GH	0.16	0.35	1.2	0.025	0.02	360	360
	P265GH	0.2	0.4	1.4	0.025	0.02	410	410
EN10219-1	S235JRH	0.17	–	1.4	0.04	0.04	360	360
	S275JOH	0.2	–	1.5	0.035	0.035	410	410
	S275J2H	0.2	–	1.5	0.03	0.03	410	410
	S355JOH	0.22	0.55	1.6	0.035	0.035	470	470
	S355J2H	0.22	0.55	1.6	0.03	0.03	470	470
	S355K2H	0.22	0.55	1.6	0.03	0.03	470	470

Tolerance of Outside Diameter and Wall Thickness for SAWH Steel Pipe

Tolerance of Outside Diameter and Wall Thickness for SAWH Steel Pipe

Standard	Tolerance of Pipe Body		Tolerance of Pipe End		Tolerance of Wall Thickness
	Out Diameter	Tolerance	Out Diameter	Tolerance
API 5L PSL1/PSL2	OD<60.3	-0.8mm～+0.4mm	OD≤168.3	-0.4mm～+1.6mm	WT≤5.0	≤±0.5
	60.3≤OD≤168.3	≤±0.75%	168.3<od≤610	≤±1.6mm	5.0<wt<15.0	≤±0.1T
	168.3<od≤610	≤±0.75%	610<od≤1422	≤±1.6mm	T≥15.0	≤±1.5
	610<od≤1422	≤±4.0mm	OD>1422	-	-	-
	OD>1422	-	-	-	-	-
API 5CT	OD<114.3	≤±0.79mm	OD<114.3	≤±0.79mm	≤-12.5%
	OD≥114.3	-0.5%～1.0%	OD≥114.3	-0.5%～1.0%	≤-12.5%
GB/T 3091	OD≤48.3mm	≤±0.5	OD≤48.3mm	-	≤±10%
	48.3<OD≤273.1mm	≤±1.0%	48.3<OD≤273.1mm	-
	273.1<od≤508mm	≤±0.75%	273.1<od≤508mm	-0.8～+2.4
	OD>508mm	≤±1.0%	OD>508mm	-0.8～+3.2
GB/T 9711.1	OD≤48.3mm	-0.79～+0.41	-	-	OD≤73	-12.5%～+20%
	60.3<od≤457mm	≤±0.75%	OD≤273.1mm	-0.4～+1.59	88.9≤OD≤457	-12.5%～+15%
	508<od≤941mm	≤±1.0%	OD≥323.9	-0.79～+2.38	OD≥508	-10.0%～+17.5%
	OD>941mm	≤±1.0%	-	-	-	-
GB/T 9711.2	60<od≤610mm	±0.75%D～±3mm	60<od≤610mm	±0.5%D～±1.6mm	4mm<wt<25mm	±12.5%T～±15.0%T
	610<od≤1430mm	±0.5%D～±4mm	610<od≤1430mm	±0.5%D～±1.6mm	WT≥25mm	-3.00mm～+3.75mm
	OD>1430mm	-	OD>1430mm	-	-	-10.0%～+17.5%
SY/T 5037	OD<508mm	≤±0.75%	OD<508mm	≤±0.75%	OD<508mm	≤±12.5%
	OD≥508mm	≤±1.00%	OD≥508mm	≤±0.50%	OD≥508mm	≤±10.0%
ASTM A53	≤±1.0%		≤±1.0%		≤-12.5%
ASTM A252	≤±1.0%		≤±1.0%		≤-12.5%