Products Description
Fluid conveyance pipes are seamless steel tubes used for transporting fluids such as water, oil, and gas, manufactured in accordance with standards ASTM A53, ASTM A106, JIS G3454, and JIS G3455. They are classified into two types based on production methods: hot-rolled (extruded) and cold-drawn (rolled).
These pipes feature a hollow cross-section, are seamless and lightweight, and reduce material consumption while maintaining equivalent bending and torsional strength. They are widely used in pipeline transportation of petroleum, natural gas, and煤气 (gas), as well as in mechanical component manufacturing.
The production process includes:
Hot-rolled method: heating round billet, piercing, and forming.
Cold-drawn method: pickling, annealing, and multi-pass processing.
Finished pipes undergo hydrostatic testing or NDT (non-destructive testing) for quality assurance.
Products specification
OD:33.4mm--508mm (1"o 20")
WT: 2mm-50mm
Length: Random Length, Fixed Length, SRL,DRL
Surface Treatment: Oil Varnish, black anti-rust paint, hot-dip galvanized,3PE,2PP,2PE,FBE,etc
Packing: Sea package,woven bags, plastic end,in bundled with lifting belts
Ends Design: Beveled ,Plain,Threaded with coupling,Grooved,Square cutted
Special Design available according to customers requirement
Quality Guarantee: SGS,BV,Lloyd's,DNV,Moody,etc.
| Standard | Material Grade |
| GB/T8163 | 10#,20#,Q345A,Q345B,Q345C,Q345D,Q345D,Q345E |
| GB/T5310 | 20G, 25MnG, 15MoG, 15CrMoG, 12Cr2MoG, 12Cr1MoVG |
| ASTM A53 | GR.A,GR.B |
| ASTM A106 | GR.A,GR.B,GR.C |
| JIS 3454 | STPG 370,STPG 410 |
| JIS 3455 | STS 370,STS 410,STS 480 |
Due to differences in manufacturing processes, they are further classified into hot-rolled (extruded) seamless steel pipes and cold-drawn (rolled) seamless steel pipes.
a. Process Flow Overview
Hot-rolled (extruded) seamless steel pipes:
Round billet → Heating → Piercing → Three-roll cross rolling, continuous rolling, or extrusion → De-tubing → Sizing (or reducing) → Cooling → Blanking tube → Straightening → Hydrostatic testing (or NDT) → Marking → Warehousing.
Cold-drawn (rolled) seamless steel pipes:
Round billet → Heating → Piercing → Upsetting (heading) → Annealing → Pickling → Oiling (copper plating) → Multi-pass cold drawing (cold rolling) → Blanking tube → Heat treatment → Straightening → Hydrostatic testing (NDT) → Marking → Warehousing.
GNEE Tube for conveyance of fluid
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