SSAW Steel Pipe, SAWL Steel Pipe

SSAW steel pipe (spiral submerged arc welded steel pipe) is formed by spiral bending of hot-rolled strip steel, and spiral seam steel pipe (also called spiral welded pipe, spiral pipe spiral steel pipe) is formed by automatic welding of submerged arc for inner and outer joints.

Material of SSAW Steel Pipe

Uses	Standard
Steel Pipe for Fluid Service	GB/T 14291
	GB/T 3091
	SY/T 5037
	ASTM A53
	BS EN10217-2
	BS EN10217-5
Steel Pipe for Ordinary Structure	GB/T 13793
	SY/T 5040
	ASTM A252
	BS EN10219-1
	BS EN10219-2
Line Pipe	GB/T 9711.1
	GB/T 9711.2
	API 5L PSL1/2
Casing	API 5CT/ ISO 11960 PSL1

Chemical Analysis and Mechanical Properties of SSAW Steel Pipe
The raw material of the SSAW steel pipe includes steel coil, welding wire, flux. All of raw materials must be through strict physical and chemical maintenance before the investment.

Standard	Grade	Chemical Composition(max)%					Mechanical Properties(min)
Standard	Grade	C	Si	Mn	P	S	Tensile Strength(Mpa)	Yield Strength(Mpa)
API 5CT	h40	–	–	–	–	0.03	417	417
	J55	–	–	–	–	0.03	517	517
	K55	–	–	–	–	0.3	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
ASTM A53	A	0.25	0.1	0.95	0.05	0.045	330	330
ASTM A53	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
EN10217-5	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

Uses of SSAW Steel Pipe
for fluid service
for low pressure fluid service
for pipelines for low pressure fluid service
for pressure purposes
for pipe piles
Cold formed welded structural hollow sections of non-alloy and fine grain steels
for pipeline transportation system of petroleum and natural gas industries(Class A steel pipe)
for use as casing or tubing for wells of petroleum and natural gas industries

SSAW Pipe (HSAW Pipe) Manufacturing Process
Spiral welded pipe production by submerged arc method is based on using tandem welding technique for joining inside and outside coil edges, which have been trimmed and beveled by carbide milling for high quality weld structure.

Spiral Seam Annealing Systems
Thermatool designs and manufactures Spiral Seam Annealing systems for producers of SAW (submerged arc welded) API line pipe.
Offering all the basic features and benefits of Thermatool seam annealing systems designed for operation on longitudinally welded API pipe, Thermatool Spiral Seam Annealing systems, however, require the installation of specially “shaped” inductors.
These are custom designed on CAD systems in order to precisely follow the helix angle for a specific pipe diameter.

Production Notes of SSAW Steel Pipe
SSAW steel pipe in the production process, we need to pay attention to a series of matters. Except for the following test items, according to the API standard and other relevant standards and the special requirements of some users, but also the need for steel, steel pipe and other tests Destructive tests, including physical and chemical properties of the raw materials into the plant sampling, visual inspection of 100% steel .
A. Oiled marking: steel after passing were oiled to prevent corrosion, and according to user requirements for marking.
B. Leveling Milling: The flat steel anvil machine so that the original curl, and then through the edge milling machine for two-sided steel milling, so as to meet the requirements of the plate width, plate edge parallelism and groove shape.
C. Shear molding: the steel plate production line along the outer edge of the spiral curl into a tube.
D. Butt cut: double-sided submerged arc welding using advanced technology to pre-welding, internal welding, outside welding. The welded tube using a plasma-foot cut to specification length.

Out diameter Wall Thickness
219mm-3620mm 5mm-25.4mm

Out Diameter	Wall Thickness (mm)
mm	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25
219.1	.	.	.	.
273	.	.	.	.	.
323.9	.	.	.	.	.	.	.
325	.	.	.	.	.	.	.
355.6	.	.	.	.	.	.	.
377	.	.	.	.	.	.	.	.
406.4	.	.	.	.	.	.	.
426	.	.	.	.	.	.	.
457	.	.	.	.	.	.	.
478	.	.	.	.	.	.	.
508	.	.	.	.	.	.	.		.
529	.	.	.	.	.	.	.		.
630	.	.	.	.	.	.	.		.	.
711	.	.	.	.	.	.	.	.	.	.	.
720	.	.	.	.	.	.	.	.	.	.	.
813		.	.	.	.	.	.	.	.	.	.	.	.
820		.	.	.		.	.	.	.	.	.	.	.
920			.	.		.	.	.	.	.	.	.	.
1020			.	.	.	.	.	.	.	.	.	.	.	.	.
1220			.	.	.	.	.	.	.	.	.	.	.	.	.
1420				.	.	.	.	.	.	.		.	.	.	.
1620					.	.	.	.	.	.	.	.	.	.	.
1820						.	.	.	.	.	.	.	.	.	.
2020							.	.	.	.	.	.	.	.	.
2220								.	.	.	.	.	.	.	.
2500								.	.	.	.	.	.	.	.	.	.	.	.	.
2540									.	.	.	.	.	.	.	.	.	.	.	.
3500										.	.	.	.	.	.	.	.	.	.	.