ASTM A53 ASME SA53 Black Carbon Steel Seamless Steel Pipe

Item No.: 00216
Shengtian Group Products ASTM/ASME A53/SA53 seamless and welded steel pipe is a general, all-purpose pipe used in generator plants, refineries, compressor stations, natural gas transmission, and steam conduction. It is acceptable for welding, flanging.
ASTM A53 ASME SA53 Black Carbon Steel Seamless Steel Pipe

Product Description

Shengtian Group Products ASTM/ASME A53/SA53 seamless and welded steel pipe is a general, all-purpose pipe used in generator plants, refineries, compressor stations, natural gas transmission, and steam conduction. It is acceptable for welding, flanging, and bending.

A53 Comparative Specifications

ASTM Specification A53 covers seamless and welded, black and hot-dipped galvanized nominal (average) wall pipe for coiling, bending, flanging and other special purposes and is suitable for welding.


Seamless and ERW Grade A Grade B
Tensile Strength, min, psi   48,000 60,000
Yield Strength 30,000 35,000


Seamless and ERW    C max % Mn max % P max % S max %
Grade A 0.25 0.95 0.05 0.045
Grade B 0.30 1.20 0.05 0.045
  • Testing Requirements for seamless and welded API 53 steel pipe
    • Hydrostatic Testing test pressures for plain and threaded and coupled pipe are specified. Hydrostatic pressure shall be maintained for not less than 5 seconds for all sizes of seamless and ERW pipe.
    • Mechanical Tests:
      • Tensile Test: Two transverse tests required on the ERW for NPS 8 and larger, one across the weld and one opposite the weld.
      • Flattening Test: On ERW for NPS 2 and larger, STD and XS wall (not required for XXS pipe)
      • Bending Test (cold): For NPS 2 and under, XS wall and under; for NPS 1-1/4 and under, XXS wall
        Degree of Bend   Diameter of Mandrel
      For normal A53 users  90 12 x nom. diameter of pipe
      For Close Coiling 180 8 x nom. diameter of pipe
    • Number of Tests: Seamless and Electric Resistance Weld (ERW) – bending, flattening, tensile on one length of pipe from each lot of 500 lengths, or less, of each pipe size.

Chemical composition of pipes for machining; C 0.08~0.19
Mn 0.40~0.70
Si 0.17~0.37
S ≤0.035
P ≤0.035
Cr 0.40~0.70
Mo 0.40~0.55
Ni ≤0.30
Performance of pipes for machining; Tensile strength)MPa:410~560 ~ 560

Yield point MPa:205

Elongation (%): 2
The purpose of the pipe for machining: Compared with solid steel such as round steel, seamless steel pipe is lighter in weight when the bending and torsion strength is the same, and it is an economic cross-section steel, which is widely used to manufacture structural parts and mechanical parts, such as oil drill pipes, bicycle racks and steel scaffolding used in construction.
Tube for machining structure
Variety classification measure Steel grade/brand executive standard application area
Outside-Diameter (mm) Wall-Thickness (mm)
Structural pipe 42~760 4~120 20#, 35#, 45#, Q345A/B/C/D, Q390, Q420, 25Mn, 27SiMn, etc. GB/T 8162 General structure with,
Mechanical tube
Vehicle tube 45~245 4~35 20Mn2,SAE1527,MZ410R,MZ530R,30Mn2,40Cr,45Mn2,etc. YB/T5035,
technical protocol
Tube for automobile axle and automobile axle sleeve
Tube for die casting DN200~DN1200 21CrMo10,21CrMo10-2,etc. Q/OHAD030,
technical protocol
Centrifugal ductile iron pipe
Tube die blank
Military pipe 42~760 4~120 30Cr,40Cr,35CrNi1MoA,etc. Military standards and agreements Military tube
Pipe for geological drilling 42~133 4~25 DZ40,DZ55,STM-R780,DZ60,etc. Q/OHAD006,
GB/T 9808 ,
technical protocol
Drilling pipe
Pipe for hydraulic prop 42~760 4~120 20#,35#,45#,27SiMn,30MnNbRE,30CrMnSi,30CrMnSiA,etc. GB/T 17396,
technical protocol
Making hydraulic equipment for coal mining, hydraulic cylinders and plungers for truck cranes.
Fluid conveying pipe 42~760 4~120 20#,Q345,Q390,etc. GB/T 8163,
technical protocol
Used as a tube for conveying fluid.

The raw material of the carbon steel pipe is a round tube blank, and the round tube embryo is cut by the cutting machine and the growth of the blank is about 1 meter, and is sent to the furnace by the conveyor belt for heating. The billets are heated in a furnace at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene.
The temperature control in the furnace is the key problem. After the round tube billet is released, it must be perforated by the pressure piercing machine. Generally, the most common piercing machine is the conical roll piercing machine, which has high production efficiency, good product quality, large perforating and expanding diameter, and can wear a variety of steel. After the perforation, the round tube blank is successively rolled by three roller skew, continuous rolling or extrusion. After extrusion, the tube should be removed for sizing. The sizing machine rotates into the steel embryo at high speed through the conical drill to punch holes and form the steel pipe.
The inner diameter of the steel pipe is determined by the outer diameter length of the caliper drill bit. After the steel pipe is calibrated, it enters the cooling tower and is cooled by water spray. After the steel pipe is cooled, it will be straightened. After the steel pipe is straightened, it is sent to the metal inspection machine (or hydraulic test) for internal inspection. If there are cracks, bubbles and other problems inside the steel pipe, it will be detected. After the steel pipe inspection, it is also strictly selected by hand. After the steel pipe quality inspection, paint the number, specification, production batch number, etc. And hoisted by crane into the warehouse.

Steel Seamless Pipes in various sizes and shapes and with different specifications per our valuable clients' requirements. Carbon Steel Seamless Pipes have very high corrosion resistance and are becoming more cost-effective frequently.

Carbon Steel Seamless Pipes are available in various types, such as Seamless / ERW / Welded / Fabricated / LSAW Pipes. They are also available in multiple forms such as Round, Square, Rectangular, Hydraulic, and many more.

We have a professional team to maintain the quality of Carbon Steel Seamless Pipe and other products throughout the manufacturing and supply, selecting high-quality raw materials to process into a finished product, marking, storage, packaging, and transportation.
Shengtian Group Products electric-welded and seamless pipe facilities meet the internationally recognized quality system requirements of ISO9001 and API Q1 and our seamless facilities hold PED certifications.
Packaging & Shipping
  1. wood pallet packing cover with water-proof paper
  2. steel pallet packing cover with water-proof paper
  3. wood box packing
  4. steel pallet packing cover with steel box
  5. in bundles with steel strip no extra packing
  6. packaged as customers' requirments.

Carbon Steel Seamless Pipes are widely used in various industries due to their excellent strength, durability, and cost-effectiveness. They are commonly used to transport fluids and gases such as water, oil, and natural gas.

The seamless steel pipe is made of perforated whole round steel, and the steel pipe without weld seam on the surface is called seamless steel pipe. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and pipe jacking.  According to different uses, there are thick-walled seamless steel pipes and thin-walled seamless steel pipes.
ASTM A53 ASME SA53 Black Carbon Steel Seamless Steel Pipe are mainly used as petroleum geological drilling pipes, cracking pipes for petrochemical industries, boiler pipes, bearing pipes and high-precision structural steel pipes for automobiles, tractors and aviation.The production of our seamless pipes is tightly regulated and all of the pipes we stock have been fully tested to international standards to ensure we only supply the highest quality products.

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