Large steel Pipe, Large Steel Pipe

Welded steel pipe DN450

Welded steel pipe (DN450) refers to steel pipes with an outer diameter of 457.2 mm. People in the industry often call it ϕ 457 steel pipes.

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ung-dung-ong-thep-phi457 — Application of large steel pipe ϕ 457

Technical specifications of DN450 welded steel pipe

Detailed product specifications will be shown by Bao Tin Steel in the table below.

Welded steel pipe specification table DN450 (ϕ457) is based on thickness standards from SCH 10-SCH 160. Common length: 6m-12m

THICKNESS STANDARD	THICKNESS	WEIGHT
SCH10	6.35mm	70.54kg/m
SCH20	7.92mm	87.67kg/m
SCH30	11.1mm	122kg/m
STD	9.5mm	104.79kg/m
SCH40	14.3mm	156kg/m
SCH60	19.1mm	206.2kg/m
SCH80	29.4mm	310kg/m
SCH120	34.9mm	363.1kg/m
SCH140	39.7mm	408.4kg/m
SCH160	45.2mm	458.8kg/m

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ong-thep-han-dn450 — Welded steel pipe DN450

Chemical composition of steel grade for manufacturing ϕ 457 steel pipes

According to the welding method, people divide welded steel pipes into many types, such as furnace-welded steel pipes, electrically welded steel pipes, and automatically welded steel pipes.
Based on the type of welding, welded steel pipes are divided into straight welded steel pipes and spiral welded steel pipes.

STEEL MARK		CHEMICAL COMPOSITION
	C	Si	Mn	P(max)	S(max)
CT33	0.06 – 0.12	0.12 – 0.30	0.25 – 0.50	0.04	0.045
CT3	0.14 – 0.22	0.12 – 0.30	0.40 – 0.60	0.045	0.045
SS 400	0.20 max	0.55 max	1.60 max	0.05	0.05
SS 540	0.30 max	–	1.60 max	0.04	0.04
SM400 A	0.23 max	–	2.5xC min	0.035	0.035
SM400 B	0.20 max	0.35	0.60-1.40	0.035	0.035

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