Pre-galvanized steel pipe

We can produce and supply to you various steel pipes according to international standard. Pre-galvanized steel pipes are used in the following fields, steel structure, build structure, guard rail, fence, metal furniture etc. our products are exported to about 50 countries in the world, we get a lot of recognition from many customers since our good quality and service.

Production standard: ASTM, JIS, BS, DIN, EN, API, GB
Section type: round, square, rectangular, oval and other special section type. 

British Standard (BS1387-85) Thin thickness pipe specification

		Outside Diameter (mm)			Weight of Black Pipe (kg/m)
Nominal Size (DN)	Screw Identifiers	Maximum	Minimum	Thickness	Plain end pipe	Threaded and With Coupler
15	1/2	21.4	21.0	2.0	0.947	0.956
20	3/4	26.9	26.4	2.3	1.38	1.39
25	1	33.8	33.2	2.6	1.98	2.00
32	11/4	42.5	41.9	2.6	2.54	2.57
40	11/2	48.4	47.8	2.9	3.23	3.27
50	2	60.2	59.6	2.9	4.08	4.15
65	21/2	76.0	75.2	3.2	5.71	5.83
80	3	88.7	87.9	3.2	6.72	6.89
100	4	113.9	113.0	3.6	9.75	10.0

Normal steel pipe size

		Outside Diameter (mm)			Weight of Black Pipe (kg/m)
Nominal Size ( DN)	Screw Identifiers	Maximum	Minimum	Thickness	Plain end pipe	Threaded and With Coupler
15	1/2	21.7	21.1	2.6	1.21	1.22
20	3/4	27.2	26.6	2.6	1.56	1.57
25	1	34.2	33.4	3.2	2.41	2.43
32	11/4	42.9	42.1	3.2	3.10	3.13
40	11/2	48.8	48.0	3.2	3.57	3.61
50	2	60.8	59.8	3.6	5.03	5.10
65	21/2	76.6	75.4	3.6	6.43	6.55
80	3	89.5	88.1	4.0	8.37	8.54
100	4	114.9	113.3	4.5	12.2	12.5
125	5	140.6	138.7	5.0	16.6	17.1
150	6	166.1	164.1	5.0	19.7	20.3