BS 3601 Carbon Steel Pipes and Tubes Supplier

Advantages and Disadvantages of Black Steel Pipes UNIASEN

BS 3601 Steel Pipes

Standard Overview:

BS 3601 specifies requirements for carbon steel pipes and tubes. They are for pressure use, especially at room temperature.

Main Material:

Carbon steel, particularly grades such as Grade 360.

Scope of Application:

BS 3601 is widely used in industries such as construction, oil and gas, and manufacturing where durable piping systems are required. Typically used for pressure vessels, piping and structural applications.

Available in both black and galvanized finishes, BS 3601 is ideal for fire protection applications. While they are flexible to bend, it is not recommended if the inside diameter of the bend is less than twelve times the outside diameter of the pipe.

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Variety of products

A complete set of specifications for steel pipes to meet the needs of different projects.

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Accept customization

Specifications and sizes can be tailored to suit the project’s needs.

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Quality Assurance

Production procedures follow quality control to ensure the highest standards of piping.

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Fast delivery

The inventory of pipe products is 20,000 tons, with fast turnover and on-time delivery.

Specification of BS 3601 Steel Pipes

Standard	BS3601
Procedure	BW, ERW, SMLS, SAW
Dimensions	BW: 8-50mm, DN6 – DN1000
	ERW: 12.7-508mm
	SMLS: 12.7mm -1016mm
	SAW: 114.3-2220mm
Thickness	BW: up to 4.5mm
	ERW: up to 12.5mm
	SMLS: up to 65mm
	SAW: up to 50mm
Unit Length	specific, random
Steel Grade	320 360 430 (ERW320 ERW360 ERW430)
Surface Coating	Varnishing, Oiling, Hot Dip Galvanizing
End Type	Square cut, Plain, Bevelled, Threaded, Socket
Joint Method	Fitting, Flange, Coupling, Clamp, Pipe Shoulder, Welding
Pipe Machining	Welding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding

Dimension

Method of Manufacture	Outside Diameter	Thickness
Method of Manufacture	mm	mm
Buttwelded	8 to 50 （nominal size）	Up to and including 4.5
Electric Resistance Welded	12.7 to 508	Up to and including 12.5
Seamless	12.7 to 1016	Up to and including 65
Submerged Arc Welded	114.3 to 2220	Up to and including 50

Chemical Requirement

Steel Grade	Method of Manufacture	Chemical Composition（ladle analysis）（see notes 1 and 2）						Mechanical Properties at Room Temperature（see note 3）
		C	Si	Mn		P	S	Rm		Remin For thickness in mm			A	Bend test bar diameter
		max	max	min	max	max	max	min	max	≤16	＞16≤40	＞40≤65	min	Bend test bar diameter
		%	%	%	%	%	%	N/mm2 b	N/mm2	N/mm2	N/mm2	N/mm2	%
320	Welded（BW and ERW）	0.16a	–	0.3	0.7	0.04	0.04	320	460	195	–	–	25	–
360	Seamless（S）	0.17	0.35	0.4	0.8	0.04	0.04	360	500	235	225	215	25	4a
360	Welded（ERW）	0.17a	0.35	0.4	0.8	0.04	0.04	360	500	235	–	–	25	–
430	Seamless（S）	0.21	0.35	0.4	1.2	0.04	0.04	430	570	275	265	255	22	4a
	Welded（ERW）	0.21	0.35	0.4	1.2	0.04	0.04	430	570	275	–	–	22	–
	Welded（SAW）	0.25	0.50	–	1.2	0.04	0.04	430	570	275	265	255	22	4a
NOTE 1：Elements not quoted in this table are not intentionally added other than for the purpose of finishing the heat. NOTE 2：For permissible deviations on product analysis，see Table 3. NOTE 3： Re is the yield strength. For acceptance purposes either the upper yield stress ReH or the 0.5% proof stress（total elongation）Rt0.5 is determined（see 13.1）. Rm is the tensile strength. A is the percentage elongation after fracture on a gauge length of Lo=5.65√So.（So is the original cross-sectional area of the gauge length.） a is the thickness of the test piece. a For welded tubes made from rimmed Steel the C max. is 0.19%. b 1N/mm2 = 1MPa.

Mechanical Requirement

Steel Grade	Method of Manufacture	Chemical Composition（ladle analysis）（see notes 1 and 2）						Mechanical Properties at Room Temperature（see note 3）
		C	Si	Mn		P	S	Rm		Remin For thickness in mm			A	Bend test bar diameter
		max	max	min	max	max	max	min	max	≤16	＞16≤40	＞40≤65	min	Bend test bar diameter
		%	%	%	%	%	%	N/mm2 b	N/mm2	N/mm2	N/mm2	N/mm2	%
320	Welded（BW and ERW）	0.16a	–	0.3	0.7	0.04	0.04	320	460	195	–	–	25	–
360	Seamless（S）	0.17	0.35	0.4	0.8	0.04	0.04	360	500	235	225	215	25	4a
360	Welded（ERW）	0.17a	0.35	0.4	0.8	0.04	0.04	360	500	235	–	–	25	–
430	Seamless（S）	0.21	0.35	0.4	1.2	0.04	0.04	430	570	275	265	255	22	4a
	Welded（ERW）	0.21	0.35	0.4	1.2	0.04	0.04	430	570	275	–	–	22	–
	Welded（SAW）	0.25	0.50	–	1.2	0.04	0.04	430	570	275	265	255	22	4a
NOTE 1：Elements not quoted in this table are not intentionally added other than for the purpose of finishing the heat. NOTE 2：For permissible deviations on product analysis，see Table 3. NOTE 3： Re is the yield strength. For acceptance purposes either the upper yield stress ReH or the 0.5% proof stress（total elongation）Rt0.5 is determined（see 13.1）. Rm is the tensile strength. A is the percentage elongation after fracture on a gauge length of Lo=5.65√So.（So is the original cross-sectional area of the gauge length.） a is the thickness of the test piece. a For welded tubes made from rimmed Steel the C max. is 0.19%. b 1N/mm2 = 1MPa.