ASTM A135/A135M ERW Steel Pipe - Standard Specification

ASTM A135 Electric Resistance Welded Steel Pipe

ASTM A135/A135M is a standard specification published by the American Society for Testing and Materials (ASTM). This specification covers electric-resistance-welded steel pipe intended for conveying gas, vapor, water, or other liquid. The pipes covered under ASTM A135/A135M are typically used in industrial applications for the transportation of fluids.

The steel can be cast in ingots or strand cast, providing flexibility in production.
We create these pipes from flat rolled steel in individual lengths or continuous length, with the welding process excluding any extraneous material. The manufacturing process involves either basic-oxygen or electric-furnace procedures, ensuring the highest quality.

For Grade B pipes, the weld seam is heat treated after welding to ensure no unhampered martensite remains.

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

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Accept customization

Sizes and other specifications can be customized to ensure that they are suitable for the project.

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

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

Specification of ASTM A135 Pipe

The production process involves either basic-oxygen or electric-furnace procedures, and the steel can be cast in ingots or strand cast.

We offer a variety of steel grades, surface coatings, end types, and joint methods, providing a product that aligns with your specific needs.

Standard	ASTM A135
Procedure	ERW
Dimensions	26.7mm – 762mm
	2″ – 30″
	DN20 – DN750
Thickness	1.52mm – 12.7mm
Thickness	SCH 5S – SCH XXS
Unit Length	2.4 – 11.6m
Steel Grade	ASTM A135 Gr. A/ASTM A135 Gr. B
Surface Coating	Oiling, or a mill coating or a special coating
End Type	Plain, Bevelled, Threaded
Joint Method	Fitting, Flange, Coupling, Clamp, Pipe Shoulder, Welding
Pipe Machining	Welding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding

Dimension of ASTM A135 ERW Steel Pipe

We offer two grades of steel for our ASTM A135 standardized Steel Pipes:

Grade A
Grade B

Grade A is a versatile grade suitable for a wide range of applications.

Grade B has been heat treated after welding, making it ideal for more demanding applications.

There is no obvious difference in the manufacturing process and appearance between Grade A and Grade B steel pipes. The main difference lies in the requirements for chemical composition and mechanical properties. Both grades meet the required chemical and mechanical requirements, ensuring a high-quality product.

TABLE X1.1 Dimensions, Nominal Weights (Masses), and Test Pressures for Light Wall Steel Pipe
NPS	DN	Outside Diameter, in. [mm]	Schedule 10		Test Pressure, psi [MPa]A
NPS	DN	Outside Diameter, in. [mm]	Speciﬁed Wall ThicknessA in. [mm]	Weight (Mass) Per Unit Length lb/ft [kg/m]	Grade A	Grade B
3⁄4	20	1.050 [26.7]	0.083 [2. 11]	0.86 [1.28]	2500 [17 200]	2500 [17 200]
1	25	1.315 [33.4]	0. 109 [2.77]	1.41 [2.09]	2500 [17 200]	2500 [17 200]
11⁄4	32	1.660 [42.2]	0. 109 [2.77]	1.81 [2.69]	2400 [16 500]	2500 [17 200]
11⁄2	40	1.900 [48.3]	0. 109 [2.77]	2.09 [3. 11]	2100 [14 500]	2400 [16 500]
2	50	2.375 [60.3]	0. 109 [2.77]	2.64 [3.93]	1700 [11 700]	1900 [13 100]
21⁄2	65	2.875 [73.0]	0. 120 [3.05]	3.53 [5.26]	1500 [10 300]	1700 [11 700]
3	80	3.500 [88.9]	0. 120 [3.05]	4.34 [6.46]	1200 [8 200]	1400 [9 600]
31⁄2	90	4.000 [101.6]	0. 120 [3.05]	4.98 [7.41]	1000 [6 900]	1200 [8 200]
4	100	4.500 [114.3]	0. 120 [3.05]	5.62 [8.37]	900 [6 200]	1100 [7 600]
5	125	5.563 [141.3]	0. 134 [3.40]	7.78 [11.58]	850 [5 900]	1000 [6 900]
A The test pressures are calculated by the following equation (but need not exceed 2500 psi or [17 200 KPa]): P=2St/D Where: P = pressure, psi [kPa], S = ﬁber stress 60 % of the speciﬁed minimum yield strength, psi [kPa], t = speciﬁed wall thickness, in. [mm], and D = speciﬁed outside diameter, in. [mm].

Chemical Requirement

Our ASTM A135/A135M standardized Steel Pipes adhere to all necessary chemical requirements. The steel used in the pipes is carefully chosen and processed to ensure it has the right chemical composition, including the appropriate amounts of carbon, manganese, phosphorus, and sulfur. The chemical composition is vital in determining the steel’s properties, such as its strength, hardness, and resistance to corrosion. We ensure that our pipes meet these chemical requirements, providing you with a product that can withstand challenging conditions.

Chemical Requirements
Element	Composition, max, %
Element	Grade A	Grade B
Carbon	0.25	0.3
Manganese	0.95	1.20
Phosphorus	0.035	0.035
Sulfur	0.035	0.035

Mechanical Requirement

Our ASTM A135/A135M standardized Steel Pipes are designed to meet rigorous mechanical requirements. They undergo a series of tests, including a tensile test, to ensure they can withstand the forces they will encounter in service. The pipes also undergo a flattening test and a hydrostatic test to verify their strength and integrity. An optional nondestructive electric test, either electromagnetic (eddy current) or ultrasonic, can be performed as an alternative to the hydrostatic test.

Tensile Requirements
Mechanical Properties	Grade A	Grade B
Tensile strength, min, ksi [MPa]	48 [330]	60 [415]
Yield strength, min, ksi [MPa]	30 [205]	35 [240]
Elongation in 2 in. or [50 mm], min, %: For pipe having a speciﬁed wall thickness of 5⁄16 in. [7.9 mm] or more, if tested using a longitudinal strip test specimen.	35	30
For pipe having a speciﬁed wall thickness of less than 5⁄16 in. [7.9 mm], if tested using a longitudinal strip test specimen.	A	B
For pipe of any size, if tested using a full-size longitudinal test specimen.	35	30
A The minimum elongation shall be determined by the following equation, with the calculated value rounded to the nearest percent:
E＝56t+16.5 [E＝2.2t+16.5]
where: E=elongation in 2 in. or [50 mm], minimum, %, and t=specified wall thickness, in. [mm]. B The minimum elongation shall be determined by the following equation, with the calculated value rounded to the nearest percent:
E＝48t+14 [E＝1.9t+14]
where: E=elongation in 2 in. or [50 mm], minimum, %, and t=specified wall thickness, in. [mm].

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