BS 1387 (EN 10255) Carbon Steel Hot Galvanized Steel Pipe for Welding and Seamless

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BS1387 Hot Galvanized Steel Pipe

Standard Overview:

BS 1387 is a British standard. It specifies requirements for galvanized steel pipes. These pipes are used mainly in construction and engineering. Although BS 1387 has been superseded in Europe by other standards such as EN 10255, it is still referenced in some regions and applications.

Main Materials:

Carbon steel. Steel is galvanized by applying a zinc coating through a hot dip process.

Scope of Application:

BS 1387 pipes are mainly used in construction and engineering projects. The main applications are in piping systems, building structures, general engineering, etc.

Nominal Pipe Size Range: DN8 to DN150, with three thicknesses to choose from: thin, medium and thick.

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Specification of BS1387

Standard	BS1387-1985
Steel Grade	Carbon Steel
Manufacture	Tube: Welded
Socket:	Seamless or Welded
Chemical composition (Ladle)	C (max): 0.20%
	Mn (max): 1.20%
	P (max): 0.045%
	S (max): 0.045%
Tensile strength, Rm	320-460 N/mm2
Yield strength, Re(min)	195 N/mm2
Elongation on gauge length	20%
Light tube	1/4”-4”, DN8-DN100
Medium tube	1/4”-6”, DN8-DN150
Heavy tube	1/4”-6”, DN8-DN150
Light tube	1.8mm-3.6mm
Medium tube	2.3mm-5.0mm
Heavy tube	2.9mm-5.4mm
Random Length	4m-7m
Mill Length	≥6.4m
Pipe Length	Approximate Length
Pipe Length	Exact Length
On Thickness	Light tube: -8%
	Medium tube: -10%
	Heavy tube: -10%
On Mass	For quantity of 150 M and over one size +/-4%
	For single tube: +10%/-8%
	PE, BE, Thread & Coupled
	Bare, Oiled, Mill Varnish, Hot-dip Galvanized, FBE, 3LPE

Dimension and Size of BS1387

Dimensions of steel tubes: Heavy
Nominal size	Designation of Thread	Outside Diameter		Thickness	Mass of Black Tube
(DN)	Designation of Thread	max.	Min.	Thickness	Plain End	Screwed and Socketed
		mm	mm	mm	kg/m	kg/m
8	1/4	13.9	13.3	2.9	0.765	0.769
10	3/8	17.4	16.8	2.9	1.02	1.03
15	1/2	21.7	21.1	3.2	1.44	1.45
20	3/4	27.2	26.6	3.2	1.87	1.88
25	1	34.2	33.4	4	2.94	2.96
32	1 1/4	42.9	42.1	4	3.8	3.83
40	1 1/2	48.8	48	4	4.38	4.42
50	2	60.8	59.8	4.5	6.19	6.26
65	2 1/2	76.6	75.4	4.5	7.93	8.05
80	3	89.5	88.1	5	10.3	10.5
100	4	114.9	113.3	5.4	14.5	14.8
125	5	140.6	138.7	5.4	17.9	18.4
150	6	166.1	164.1	5.4	21.3	21.9
NOTE: Maximum and minimum outside diameters meet the requirements of ISO 65.

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Chemical Requirement

Chemical Composition And Mechanical Properties At Room Temperature
Chemical Composition (Ladle)				Mechanical Properties At Room Temperature
C	Mn	P	S	Tensile	Yield	Elongation On Gauge Length
max.	Max.	Max.	Max.	Strength, Rm	Strength Re(min.)	Lo=5.65 √So A (min.)
%	%	%	%	N/mm2	N/mm2	%
0.2	1.2	0.045	0.045	320 to 460	195	20

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Mechanical Requirement

Chemical Composition And Mechanical Properties At Room Temperature
Chemical Composition (Ladle)				Mechanical Properties At Room Temperature
C	Mn	P	S	Tensile	Yield	Elongation On Gauge Length
max.	max.	max.	max.	Strength, Rm	Strength Re(min.)	Lo=5.65 √So A (min.)
%	%	%	%	N/mm2	N/mm2	%
0.2	1.2	0.045	0.045	320 to 460	195	20

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Why Choose UNIASEN?

At UNIASEN, we offer BS 1387 (EN 10255) steel pipes. They are the British Standard for welded black pipes, meant to be screwed into BS21 pipe threads.
These hot-dip galvanized steel pipes are suitable for threading. They are widely used for gas, air, and water delivery. They are also used in civil engineering and other structural work.
UNIASEN offers a wide selection of steel grades for our BS 1387 steel pipes. Surface coatings enhance durability.
Our BS 1387 steel pipes use a specific mix of elements. It gives them strength, ductility, and corrosion resistance.
Precision is at the heart of UNIASEN’s production process. Our BS 1387 steel pipes are made to strict tolerances. This ensures their accuracy, uniformity, and quality.
The mechanical properties of our BS 1387 steel pipes are tailored to provide optimal performance. We must balance factors like tensile strength and hardness. This ensures durability and functionality.
Our BS 1387 steel pipes are well-made to exact specifications. We can tailor dimensions to meet various industrial needs. Our production methods follow international standards.
End types and fitting methods are for easy installation. Our processing services offer customization for your application.

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