1)widely used in various Industries 2) very useful one in automobile Industries, structure etc. 3)also manufacture Galvanized

Size (mm)	Thickness	Specification	End Use
15 NB to 500 NB	Sch10 to Sch. 40	ASTM A 53 A / B	Oil and Gas, Chilled water
15 NB to 150 NB	L, M, H	DIN 2440/ BS 1387/ EN10255	Water Line, Irrigation
15 NB to 150 NB	L,M & H	IS 1239 (PT-1 2004), IS	Water line, Irrigation
165.1MM OD to 508 MM OD	2.60MM TO 12.70MM	IS 3589/2001 GRADE FE 330 & FE 410	Water & Sewage
15 NB to 300 NB	1.80 MM TO 10.0MM	IS 3601ASTM : A-513 BS : 1775JIS : G 3444	General Purpose

pls feel free to contact jane by sales1 at yanshunchina dot com dot cn      if have needs

BS1139 48.3mm black scaffolding steel pipe