The ratio of steel used in low-temperature alloy tubes to carbon structural steel. It has the advantages of high strength, good comprehensive performance, long service life, wide application range and comparative economy. The steel is mostly rolled into plates, profiles, seamless steel pipes and so on.

• NPS  (in)	Outside Diameter (in)	ASTM A333 Grade 6 Carbon Steel Seamless Pipes Schedule
  		SCH 10	SCH 20	SCH 30	SCH STD	SCH 40	SCH 60	SCH XS	SCH 80	SCH 100	SCH 120	SCH 140	SCH 160	SCH XXS
  		Wall Thickness (in)
  1/8	0.405				0.068	0.068		0.095	0.095
  1/4	0.540				0.088	0.088		0.119	0.119
  3/8	0.675				0.091	0.091		0.126	0.126
  1/2	0.840				0.109	0.109		0.147	0.147				0.187	0.294
  3/4	1.050				0.113	0.113		0.154	0.154				0.219	0.308
  1	1.315				0.133	0.133		0.179	0.179				0.250	0.358
  1 1/4	1.660				0.140	0.140		0.191	0.191				0.250	0.382
  1 1/2	1.900				0.145	0.145		0.200	0.200				0.281	0.400
  2	2.375				0.154	0.154		0.218	0.218				0.344	0.436
  2 1/2	2.875				0.203	0.203		0.276	0.276				0.375	0.552
  3	3.500				0.216	0.216		0.300	0.300				0.438	0.600
  3 1/2	4.000				0.226	0.226		0.318	0.318
  4	4.500				0.237	0.237		0.337	0.337		0.438		0.531	0.674
  5	5.563				0.258	0.258		0.375	0.375		0.500		0.625	0.750
  6	6.625				0.280	0.280		0.432	0.432		0.562		0.719	0.864
  8	8.625		0.250	0.277	0.322	0.322	0.406	0.500	0.500	0.594	0.719	0.812	0.906	0.875
  10	10.750		0.250	0.307	0.365	0.365	0.500	0.500	0.594	0.719	0.844	1.000	1.125	1.000
  12	12.750		0.250	0.330	0.375	0.406	0.562	0.500	0.688	0.844	1.000	1.125	1.312	1.000
  14	14.000	0.250	0.312	0.375	0.375	0.438	0.594	0.500	0.750	0.938	1.094	1.250	1.406
  16	16.000	0.250	0.312	0.375	0.375	0.500	0.656	0.500	0.844	1.031	1.219	1.438	1.594
  18	18.000	0.250	0.312	0.438	0.375	0.562	0.750	0.500	0.938	1.156	1.375	1.562	1.781
  20	20.000	0.250	0.375	0.500	0.375	0.594	0.812	0.500	1.031	1.281	1.500	1.750	1.969
  22	22.000	0.250	0.375	0.500	0.375		0.875	0.500	1.125	1.375	1.625	1.875	2.125
  24	24.000	0.250	0.375	0.562	0.375	0.688	0.969	0.500	1.219	1.531	1.812	2.062	2.344
  30	30.000	0.312	0.500	0.625	0.375			0.500
  32	32.000	0.312	0.500	0.625	0.375	0.688
  34	34.000	0.312	0.500	0.625	0.375	0.688
  36	36.000	0.312	0.500	0.625	0.375	0.750
  42	42.000		0.500	0.625	0.375	0.750

Low temperature steel pipe is a medium carbon structural steel, hot and cold steel pipe can be good, good mechanical properties, low temperature steel pipe is a kind of steel pipe specially used to withstand high pressure and harsh conditions in low temperature environment, which is characterized by good low temperature toughness and strength.

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