Standard: ASTM A53, ASME SA 53
ASTM A53, ASME SA53 steel pipe standard specifies for seamless and welded black steel pipes and hot-dipped galvanized steel pipes. It covers the sizes in NPS 1/8 to NPS 26.
Application of ASTM A53 Gr.A & Gr.B Seamless Steel Pipe:
ASTM A53 Gr.A &Gr.B seamless steel pipe is for mechanical and pressure applications and is also acceptable for ordinary uses in steam, water,gas, and air lines. Besides, ASTM A53 Gr.A &Gr.B seamless steel pipe can also be applied for structural use, like piles, beams, pillars, fencing etc.
Manufacturing Process of ASTM A53 Gr.A & Gr.B Seamless Steel Pipe:
ASTM A53 Gr.A &Gr.B seamless steel pipe are produced either by cold-drawn or hot rolled, as specified.
Details of ASTM A53 Gr.A & Gr.B Seamless Steel Pipe We can supply:
Manufacture: Seamless process, cold drawn or hot rolled
Cold drawn: O.D.: 15.0～100mm W.T.: 2～10mm
Hot rolled: O.D.: 25~700mm W.T.: 3~50mm
Grade: Grade A and Grade B.
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Threaded
Chemical Composition of ASTM A53 Gr.A & Gr.B Seamless Steel Pipe
Grade and Chemical Composition (％)
|Type S (Seamless pipe)|
Mechanical Properties of ASTM A53 Gr.A & Gr.b Seamless Steel Pipe
|Grade A||Grade B|
|Tensile strength, min, psi (MPa)||48000 (330)||60000 (415)|
|Yield strength, min, psi (MPa)||30000 (205)||35000 (240)|
Permissible Variations in Weight and Dimensions
Weight –The weight of the pipes shall not vary more than ±10% from its specified weight (mass).
Diameter-For pipes NPS 11/2 OR smaller, the outside diameter at any point shall not vary more than ±1/64 in. From the specified outside diameter. For pipes NPS 2 (DN50) or larger, the outside diameter shall not vary more than ±1% from the specified outside diameter.
Thickness-The minimum wall thickness at any point shall be not more than 12.5% under the specified wall thickness.
Mechanical Tests for ASTM A53 Gr.A & Gr.b Black Seamless Steel Pipe
Bending Test— a sufficient length of pipe shall stand being bent cold through 90° around a cylindrical mandrel.
Flattening test-although testing is not required, pipe shall be capable of meeting the flattening test requirements.
Hydro-static test—except as allowed ,each length of pipe shall be subjected to the hydro-static test without leakage through the pipe wall.
Nondestructive electric test-as an alternative to the hydro-static test ,the full body of each pipe shall be tested with a nondestructive electric test . where nondestructive electric test is performed,the lengths shall be marked with the letters "NDE"
The ultrasonic testing
The eddy current examination
Appearance for ASTM A53 Gr.A & Gr.b Black Seamless Steel Pipe
A sufficient number of visual surface imperfections to provide seasonable assurance is necessary. The defect shall be removed or cut off within the limits of requirements on length. The finished pipe shall be reasonably straight.
Marking for ASTM A53 Gr.A & Gr.b Black Seamless Steel Pipe
a. Manufacturer's name or mark
b. Specification number(year-date or required)
c. Size( OD, W.T, length)
d. Grade( A or B)
e. Type of pipe( F, E, or S)
f. Test pressure( seamless steel pipe only)
g. Heat Number
h. Any additional information specified in the purchase order.
Packing for ASTM A53 Gr.A & Gr.b Black Seamless Steel Pipe:
a. Bare pipe or Black / Varnish coating ( customized);
b. 6" and below in bundles with two cotton slings ;
c. Both ends with end protectors;
d. Plain end, bevel end(2" and above with bevel ends, degree: 30~35°), threaded and coupling;