Cangzhou, Hebei Province, China

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E-mail:

15632796000@126.com

Mobile:

+86-15632796000

Address:

No. 35 Xingye Road, Economic Development Zone, Cangzhou City, Hebei Province

Spiral steel pipe

The company currently has 10 production lines for double-sided submerged arc welded pipes.

Commodity name： Spiral steel pipe

Classification:

Spiral Steel Pipe

E-mail:

15632796000@126.com

Inquiry

Spiral steel pipe

The company currently has 10 production lines for double-sided submerged arc welded pipes. Our product now has an outer diameter of 219-3500mm and a wall thickness of 6mm-28mm. The product complies with the SY/T5037-2000 GB/T9711-2011API5L standard and is made of Q235A/BQ345B/C/D16mnX42-X80 material. The product is widely used in long-distance natural gas and oil pipelines, chemical, power, thermal, hydraulic and other fields.

Chemical Analysis and Mechanical Properties

Standard	Grade	Chemical Composition(max)%					Mechanical Properties(mm)
Standard	Grade	C	Si	Mn	P	S	Mield Srengh (Mpa)	Tensle Srengh(Mpa)
API5CT	H40	-	-	-	-	0.030	417	417
	J55	-	-	-	-	0.030	517	517
	K55	-	-	-	-	0.300	665	665
API5LPSL1	A	0.22	-	0.90	0.030	0.030	335	335
	B	0.26	-	1.20	0.030	0.030	415	415
	X42	0.26	-	1.30	0.030	0.030	415	415
	X46	0.26	-	1.40	0.030	0.030	435	435
	X52	0.26	-	1.40	0.030	0.030	460	460
	X56	0.26	-	1.40	0.030	0.030	490	490
	X60	0.26	-	1.40	0.030	0.030	520	520
	X65	0.26	-	1.45	0.030	0.030	535	535
	X70	0.26	-	1.65	0.030	0.030	570	570
API5LPSL2	B	0.22	0.45	1.20	0.025	0.015	415	415
	X42	0.22	0.45	1.30	0.025	0.015	415	415
	X46	0.22	0.45	1.40	0.025	0.015	435	435
	X52	0.22	0.45	1.40	0.025	0.015	460	460
	X56	0.22	0.45	1.40	0.025	0.015	490	490
	X60	0.12	0.45	1.60	0.025	0.015	520	520
	X65	0.12	0.45	1.60	0.025	0.015	535	535
	X70	0.12	0.45	1.70	0.025	0.015	570	570
	X80	0.12	0.45	1.85	0.025	0.015	625	625
GB/T 9711.1	L210	-	-	0.90	0.030	0.030	335	335
	L245	-	-	1.15	0.030	0.030	415	415
	L290	-	-	1.25	0.030	0.030	415	415
	L320	-	-	1.25	0.030	0.030	435	435
	L360	-	-	1.25	0.030	0.030	460	460
	L390	-	-	1.35	0.030	0.030	490	490
	L415	0.26	-	1.35	0.030	0.030	520	520
	L450	0.26	-	1.40	0.030	0.030	535	535
	L485	0.23	-	1.60	0.030	0.030	570	570
GB/T3091/ SY/T5037	Q195	0.12	0.30	0.50	0.035	0.040	315	315
	Q215B	0.15	0.35	1.20	0.045	0.045	335	335
	Q235B	0.20	0.35	1.40	0.045	0.045	370	370
	Q345B	0.20	0.50	1.70	0.035	0.035	470	470
ASTM A53	A	0.25	0.10	0.95	0.050	0.045	330	330
ASTM A53	B	0.30	0.10	1.20	0.050	0.045	415	415
ASTM A252	1	-	-	-	0.050	-	345	345
	2	-	-	-	0.050	-	414	414
	3	-	-	-	0.050	-	455	455
EN10217-1	P195TR1	0.13	0.35	0.70	0.025	0.020	320	320
	P195TR2	0.13	0.35	0.70	0.025	0.020	320	320
	P235TR1	0.16	0.35	1.20	0.025	0.020	360	360
	P235TR2	0.16	0.35	1.20	0.025	0.020	360	360
	P265TR1	0.20	0.40	1.40	0.025	0.020	410	410
	P265TR2	0.20	0.40	1.40	0.025	0.020	410	410
EN10217-2	P195GH	0.13	0.35	0.70	0.025	0.020	320	320
	P235GH	0.16	0.35	1.20	0.025	0.020	360	360
	P265GH	0.20	0.40	1.40	0.025	0.020	410	410
EN10217-5	P235GH	0.16	0.35	1.20	0.025	0.020	360	360
EN10217-5	P265GH	0.20	0.40	1.40	0.025	0.020	410	410
EN10219-1	S235JRH	0.17	-	1.40	0.040	0.040	360	360
	S275JOH	0.20	-	1.50	0.035	0.035	410	410
	S275J2H	0.20	-	1.50	0.030	0.030	410	410
	S335JOH	0.22	0.55	1.60	0.035	0.035	470	470
	S335J2H	0.22	0.55	1.60	0.030	0.030	470	470
	S335K2H	0.22	0.55	1.60	0.030	0.030	470	470

Standard and Classfication

Classfication	Standard	Main Products
Steel pipe for Fluid Service	GB/T 14291	Welded pipe for mine fluid service
	GB/T 3091	Welded pipe for low pressure fluid service
	SY/T 5037	Spirally submerged arc welded steel pipe for pipelines for low pressure fluid service
	ASTMA53	Black and hot-hipped galvanized welded and seamless steel pipe
	BS EN10217-2	Welded steel types for pressure purposes-delivery technical conditions-part2: Electnic welded non-alloy and alloy steel tubes with specified elevated femperature properties
	BS EN10217-5	Welded steel types for pressure purposes-delivery technical conditions-part5: submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature properties
Steel Pipe for Ordinary Structure	GB/T 13793	Longitudinally electric resistance welded steel pipe
	SY/T 5040	Spirally submerged arc welded steel pipe piles
	ASTM A252	Welded and seamless steel pipe piles
	BS EN10219-1	Cold formed welded structural hollow sections of non-alloy and fine grain steels-part1:Technical deliver conditions
	BS EN10219-2	Cold fomed welded structural hollow sections of non-alloy and fine grain steels-part2:tolerances dimmsions and sectional properties
Line Pipe	GB/T 9711.1	Steel pipe for pipeline transportation system of pertroleum and natural gas industries(Class B steel pipe)
	GB/T 9711.2	Steel pipe for pipeline transportation system of pertroleum and natural gas industries(Class B steel pipe)
	API 5L PSL1/2	Line pipe
Casing	API 5CTISO 11960 PSL1	Steel pipe for use as casing or tubing for wells of pertroleum and natural gas industries(Class B steel pipe)

Tolerance of Outside Diameter and Wall Thickness

Standard	Tolerance of Pipe Body		Tolerance of Pipe End		Tolerance of Wall Thickness
Standard	Out Diameter	Tolerance	Out Diameter	Tolerance	≤±10%
GB/T3091	OD≤48.3mm	±0.5	OD≤48.3mm
	48.3mm<OD=273.1mm	≤±1.0%	48.3mm<OD=273.1mm	-
	273.1<0D=508mm	≤±0.75%	273.1<0D=508mm	-0.8~+2.4
	OD>508mm	≤±1.0%	OD>508mm	-0.8~+3.2
GB/T9711.1	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%
	608<0D≤941mm	≤±1.0%	OD≤323.9	-0.79~2.38	OD≥508	-10.0%-+17.5%
	OD>941mm	≤±1.0%	-	-	-	-
GB/T9711.2	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/T5037	OD<50Bmm	±0.75%	OD<508mm	≤±0.75%	OD<508mm	≤±12.5%
SY/T5037	OD≥508mm	s±1.0%	OD≥508mm	≤±0.50%	OD≥508mm	≤±10.0%
API 5LPSL 1PSL2	OD<60.3	-0.8mm-+0.4mm	OD=168.3	-0.4mm-+1.6mm	WT≤5.0	±0.5
	60.3≤0D≤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	s±1.6mm	T≥15.0	s±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%
API 5CT	OD≥114.3	-0.5%~1.0%	OD≥114.3	-0.5%-1.0%	≤-12.5%
ASTM A53	≤±1.0%		≤±1.0%		≤-12.5%
ASTM A252	≤±1.0%		买±1.0%		≤-12.5%

Nspection

We pay attention to product inspection and adhere to the principle of "quality first, management first". Each product must be inspected by inspection equipment, such as industrial television testing equipment to check weld seams and appearance quality, magnetic flaw detectors to check steel pipe defects, ultrasonic automatic continuous flaw detectors to detect horizontal and vertical defects in welded steel pipes, X-ray automatic detectors and industrial television imaging equipment to check internal quality, with a sensitivity of not less than 4%. The X-ray film equipment checks the original welds and has a sensitivity of not less than 2%. Hydraulic press and microcomputer automatic recording system are used to test the pressure quality of each steel pipe. Mechanical testing equipment includes hydraulic universal testing machines and computer control systems to test welds, including tensile, guided bending, slotting machines, Charpy impact testing machines, various sample processing machines including lathes, grinding planes, grinders, and chemical composition analysis.

Production Process

(1) Process technology preparation: Select a reasonable steel strip width based on the nominal outer diameter of the steel pipe. Prepare steel pipe welding parameters, steel pipe inspection process cards, and production plans based on raw materials, and distribute them to each production and inspection process.

(2) Uncoiling process: After receiving the production process card, the qualified steel strip is lifted onto the uncoiler according to the production process requirements, and the steel strip is uncoiled and leveled.

(3) After the steel strip is leveled, it runs to the butt welding process, and the butt welding personnel perform the butt welding according to the issued welding parameters.

(4) After the welding of the steel strip is completed, it runs forward to the disc cutting process and cuts the burrs of the steel strip according to the cutting amount specified in the production process card.

(5) After cutting the edges of the steel strip, it runs to the milling process to further process the edges of the steel strip, such as removing burrs and milling off grooves on steel plates larger than 8mm.

(6) After the edge milling treatment of the steel strip, the edge of the steel strip is pre bent to form a "pout" phenomenon in the welding seam during the forming process.

(7) The steel strip enters the forming machine, and the forming worker adjusts the shape according to the issued production process card.

(8) After the steel pipe is formed, the internal welder performs internal weld welding on the steel pipe according to the issued welding parameter table.

(9) After the internal welding of the steel pipe is completed, when the weld seam rotates half a week to pass over the steel pipe, the external welder performs external welding on the weld seam.

(10) In the case of a smaller reduction rate, the steel pipe can achieve a certain required dimensional accuracy and roundness through sizing, and further improve the appearance quality of the steel pipe.

(11) After the external welding of the steel pipe is completed, it continues to move forward. When the top of the steel pipe reaches the specified length requested by the customer, it is transmitted to the plasma cutting machine through a photoelectric sensor for cutting the steel pipe to the specified length.

(12) If there are defects in the steel pipe welds, they can be manually repaired to remove the defects and proceed to the next process.

(13) Process the ends of the steel pipes to make them straight and ensure that the bevel angle meets the standard requirements.

(14) Measure the length and weight of each steel pipe, and control the weight deviation and length within the standard range.

(15) Eliminate the phenomenon of magnetic bias blowing caused by residual magnetism during steel pipe butt welding, and improve the quality of steel pipe butt welding welds.

(16) Spray labels on the inner and outer walls of one end of the steel pipe according to standards and customer requirements.

Key Words

Spiral steel pipe

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