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Mechanical seamless steel pipe

What is Mechanical seamless steel pipe?

Mechanical seamless steel pipe is one of the most commonly used types of seamless steel pipes. The seamless steel pipe has a hollow section and has no welds from the beginning to the end. Compared with solid steel such as round steel, seamless steel pipe is lighter in weight when it has the same flexural and torsional strength. Steel scaffolding used in building construction, etc.

Mechanical seamless steel pipe process flow

Hot rolling (extruded seamless steel pipe): round tube blank → heating → piercing → three-roll cross rolling, continuous rolling or extrusion → tube removal → sizing (or reducing) → cooling → billet tube → straightening → quality inspection Wall thickness→hydraulic test (or flaw detection)→marking→storage.
Cold drawn (rolled) seamless steel pipe: round tube blank→heating→piercing→heading→annealing→pickling→oiling (copper plating)→multi-pass cold drawing (cold rolling)→blank tube→heat treatment→straightening→ Quality inspection wall thickness → hydraulic test (flaw detection) → marking → storage.

Mechanical Seamless Steel Tube Specifications

Product name

Mechanical seamless steel pipe


10#, 20#, 45#, 16Mn, A53(A,B), Q235, Q345, Q195, Q215, St37, St42, St37-2, St35.4, St52.4, ST35

Wall Thickness


Outer Diameter



Length:Single random length/Double random length

5m-14m,5.8m,6m,10m-12m,12m or as customer's actual reques


API 5L, ASTM A53-2007, ASTM A671-2006, ASTM A252-1998, ASTM A450-1996, ASME B36.10M-2004, ASTM A523-1996, BS 1387, BS EN10296, BS
6323, BS 6363, BS EN10219, GB/T 3091-2001, GB/T 13793-1992, GB/T9711


10#-45#, 16Mn, A53-A369, Q195-Q345, ST35-ST52

Grade A, Grade B, Grade C

Section Shape

Square, Rectangular, Round,

Pipe Ends

Plain end/Beveled,protected by plastic caps on both ends, cut quare,grooved,threaded and coupling,etc.

Surface Treatment

1. Galvanized

2. PVC,Black and color painting

3. Transparent oil,anti-rust oil

4. According to clients requirement

Product Application

1. Fence, greenhouse, door pipe,greenhouse

2. Low pressure liquid, water, gas, oil, line pipe

3. For both indoor and outdoor the building construction

4. Widely used in scaffolding construction which is much cheaper and convenient


API ISO9001-2008,SGS.BV

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