ERW Line Pipe (Straight Seam Welded Pipe) Manufacturer

ERW Line Pipe (Straight Seam Welded Pipe)

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ERW Straight Seam Welded Pipe for Oil & Gas Transporting

Standards
GB/T9711-2011 eqv ISO 3183:2007: Steel pipes for pipeline transportation system in oil and natural gas industries;
API Spec 5L (45th edition): Specification for Line Pipe

Applications
The ERW line pipes are mainly used in petroleum and natural gas industries for transporting water, gas and oil. Designed in various wall thicknesses and grades, our electric resistance welded pipes provide a wide range of oil and gas transmission solutions.
Main Steel Grades:
L245, L290, L320, L360, L390, L415, L450, L485, L555;
B, X42, X46, X52, X56, X60, X65, X70, X80, X90, X100, X120;
L245M, L245M, L290M, L320M , L360M, L390M, L415M, L450M, L485M, L555M, L625M, L690M, L830M

Technical Specifications of the Line Pipe

O.D. (Inch & mm)		Wall Thickness (Inch & mm)
		Inch	0.08	0.11	0.13	0.14	0.16	0.17	0.19	0.22	0.25	0.28	0.31	0.34	0.37	0.44	0.5	0.56
		mm	2.1	2.8	3.2	3.6	4.0	4.4	4.8	5.7	6.4	7.1	7.8	8.7	9.3	11.1	12.7	14.3
4	101.6	5.15	6.82	7.77	8.7	9.63	10.55	11.46	13.48	15.03	16.55
4	114.3	5.81	7.7	8.77	9.83	10.88	11.93	12.96	15.27	17.03	18.77	20.49
5	141.3	7.21	9.56	10.9	12.23	13.54	14.86	16.16	19.06	21.29	23.5	25.68	28.45
6	168.3	8.61	11.43	13.03	14.62	16.21	17.78	19.35	22.86	25.55	28.23	30.87	34.24	36.47
8	219.1	11.24	14.94	17.04	19.13	21.22	23.3	25.37	30	33.57	37.12	40.65	45.14	48.12	56.94
10	273.1	14.03	18.66	21.3	23.93	26.55	29.16	31.76	37.59	42.09	46.58	51.03	56.73	60.5	71.72	81.56
12	323.9	16.67	22.17	25.31	28.44	31.56	34.67	37.77	44.73	50.11	55.47	60.8	67.63	72.15	85.63	97.47	109.18

Main Technical Indexes (Unit: mm (in))

Outside Diameter /mm (in)	Allowable deviation of outside diameter /mm (in)		Out-of-roundness /mm (in)
Outside Diameter /mm (in)	Pipe body	Pipe end (Within 100mm to the pipe end)	Out-of-roundness /mm (in)
D < 60.3(2.375)	-0.8(0.031)~ 0.4 (0.016)	-0.8(0.031)~ 0.4 (0.016)	0.9 (0.036)
60.3 (2.375) ≤D≤168.3 (6.625)	±0.0075D	-0.4(0.016)~ 0.16 (0.063)	D/T≤75, 0.015D D/T ＞ 75, according to agreement
168.3 (6.625)< D≤610 (24.00)	±0.0075D Max.:±3.2 (0.125)	±0.005D Max.:±1.6 (0.063)	0.015D

Wall thickness	Allowable deviation of wall thickness
T ≤5.0 (0.197)	±0.5 (0.020)
5.0 (0.197)< T < 15.0 (0.591)	±0.1T
15.0 (0.591) ≤ T	±1.5 (0.060)
1. If the minus deviation of wall thickness regulated in contract is less than the value in this table, plus deviation should be added by some to ensure the right deviation range. 2. Plus deviation of wall thickness is not suitable for weld joint area