Line Pipe

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Yunhua also supplies line pipes for oil, water, and natural gas transmission. These seamless steel piping meets API SPEC5L requirements.

Line pipes are steel pipes primarily used to transport a number of resources out of the ground and send them to the oil and gas enterprises. Yunhua's seamless steel pipes are made from a number of steel grades, including B, X42, X46, X52, X56, X60, X65, and X70. These pipes are strong and durable, allowing them to withstand high pressure, acid, and harsh corrosive marine environments.

Standards
API SPEC 5L, GB/T9711

Uses
Line pipes are used to build pipelines that transport natural gas, petroleum, oil and water. These seamless casing pipes are used to line the walls of a gas well, preventing its collapse.

Steel Grades

Standards	Steel Grades	Note
API5L PSL1	B, X42, X46, X52, X56, X60, X65, X70
API5L PSL2	BN, X42N, X46N, X52N, X56N, X60N, X65Q, X70Q, X80Q
API5L PSL2 Appendix H	BNS, BQS, X42NS, X42QS, X46NS, X46QS, X52NS, X52QS, X56QS, X60QS, X65QS, X70QS	Acid resistant
API5L PSL2 Appendix J	BNO, BQO, X42NO, X42QO, X46NO, X46QO, X52NO, X52QO, X56QO, X60QO, X65QO, X70QO, X80QO	Suitable for marine environments
GB9711	L245N, L290N, L320N, L360N, L390N, L415N, L450Q, L485Q, L555Q

Technical Specs

Nominal Size		Outer Diameter	Nominal Wall Thickness
Nominal Size		Outer Diameter	Nominal Wall Thickness
DN	INCH	ASME	SCH10	SCH20	SCH30	STD	SCH40	SCH60	XS	SCH80	SCH100	SCH120	SCH140	SCH160	XXS
15	1/2"	21.3	2.11		2.41	2.77	2.77		3.73	3.73				4.78	7.47
20	3/4"	26.7	2.11		2.41	2.87	2.87		3.91	3.91				5.56	7.82
25	1"	33.4	2.77		2.9	3.38	3.38		4.55	4.55				6.35	9.09
32	1.1/4"	42.2	2.77		2.97	3.56	3.56		4.85	4.85				6.35	9.7
40	1.1/2"	48.3	2.77		3.18	3.68	3.68		5.08	5.08				7.14	10.15
50	2"	60.3	2.77		3.18	3.91	3.91		5.54	5.54				8.74	11.07
65	2.1/2"	73	3.05		4.78	5.16	5.16		7.01	7.01				9.53	14.02
80	3"	88.9	3.05		4.78	5.49	5.49		7.62	7.62				11.13	15.25
90	3.1/2"	101.6	3.05		4.78	5.74	5.74		8.08	8.08
100	4"	114.3	3.05		4.78	6.02	6.02		8.56	8.56		11.13		13.49	17.12
125	5"	141.3	3.4			6.55	6.55		9.53	9.53		12.7		15.88	19.05
150	6"	168.3	3.4			7.11	7.11		10.97	10.97		14.27		18.26	21.95
200	8"	219.1	3.76	6.35	7.04	8.18	8.18	10.31	12.7	12.7	15.09	18.26	20.62	23.01	22.23
250	10"	273	4.19	6.35	7.8	9.27	9.27	12.7	12.7	15.09	18.26	21.44	25.4	28.58	25.4
300	12"	323.8	4.57	6.35	8.38	9.53	10.31	14.27	12.7	17.48	21.44	25.4	28.58	33.32	25.4
350	14"	355.6	6.35	7.92	9.53	9.53	11.13	15.09	12.7	19.05	23.83	27.79	31.75	35.71
400	16"	406.4	6.35	7.92	9.53	9.53	12.7	16.66	12.7	21.44	26.19	30.96	36.53	40.19
450	18"	457.2	6.35	7.92	11.13	9.53	14.27	19.05	12.7	23.83	39.36	34.93	39.67	45.24
500	20"	508	6.35	9.53	12.7	9.53	15.09	20.62	12.7	26.19	32.54	38.1	44.45	50.01
550	22"	558.8	6.35	9.53	12.7	9.53		22.23	12.7	28.58	34.93	41.28	47.63	53.98
600	24"	609.6	6.35	9.53	14.27	9.53	17.48	24.61	12.7	30.96	38.89	46.02	52.37	59.54
650	26"	660.4	7.92	12.7		9.53			12.7
700	28"	711.2	7.92	12.7	15.88	9.53			12.7
750	30"	762	7.92	12.7	15.88	9.53			12.7
800	32"	812.8	7.92	12.7	15.88	9.53	17.48		12.7
850	34"	863.6	7.92	12.7	15.88	9.53	17.48		12.7
900	36"	914.4	7.92	12.7	15.88	9.53	19.05		12.7
950	38"	965.2				9.53			12.7
1000	40"	1016				9.53			12.7
1050	42"	1066.8				9.53			12.7