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Hot Rolled Seamless Steel Pipe

Product name: Hot rolled seamless steel pipe, smls steel pipe, cs pipe, seamless line pipe, Hot rolled smls pipe, Hot-Rolled Steel Tube, hot rolling seamless pipe, Hot-Rolled Steel pipe

Materials:  20#, GR.B, X42, X56, P11, P22, ST37, ST44, ST52, S235JR, S355JR, STP430.
Standard: API 5L, A106, A53, A335, A333, DIN1629, DIN2448, GOST8731, JIS G3454.

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Hot rolled seamless steel pipe type

Carbon steel semless pipe, Alloy steel seamless pipe, Wall thickness steel pipe

Hot rolled seamless steel pipe specification:

  • Outer diameter: 2”-40” (60mm-1016mm).
  • Wall thickness: 2mm-100mm.
  • Length: 3m-14m
  • Surface: oiling, spraying black paint ( or varnish), galvanized, 3PE, FBE epoxy anti-corrosion coating etc.

Hot rolled seamless steel pipe application

Widely used in industry, chemical industry, construction, water treatment, agricultural irrigation, highway billboards, fire fighting , bridge supporting , gas & oil conveying, mine and oilfield drilling.

Production of seamless pipe

The process begins with solid steel rounds, or billets, being cut to a specified length and sent through a walking-beam reheat furnace, where temperatures reach nearly 2,300°F. After exiting the reheat furnace, the preheated rounds are turned into a tube shell in the rotary piercing mill as the billets are cross-rolled between two barrel-shaped rolls at a high speed. The seamless shells enter mandrel mill, where they are rolled over a retained mandrel to provide the needed OD size and wall thickness for the next process. The process is carefully monitored using a state-of-the-art hot-wall measuring system. The shells are then reheated for final forming in a 24-stand stretch-reducing mill, where outside diameters are formed to customers’ exacting specifications. Wall thickness is again verified using a hot-wall measuring system. After being rotated and advanced on the walking-beam cooling bed, the pipes are batch cut and transferred to an in-process storage area, where they are handled by computer-controlled gantry cranes.

Hor rolled seamless steel pipe quality inspection:

  1. Our factory has its own “experimental testing center”.CNAS Laboratory Accreditation Certificate
  2. Control quality strictly.The first pass is the quality inspection on the production line,The second pass is full inspection of the  production quality .
  3. We have got internationally recognized certificates, ISO, CE, LR,Philippine certificate,also support third-party testing,as SGS, BV, ect.

Hot rolled seamless steel pipe feature

Carbon seamless steel pipe (SMLS) is formed by drawing a solid billet over a piercing rod to create the hollow shell, without welding or seam. The most advantage is increasing the ability of withstanding higher pressure.n improve material utilization, simplify the manufacturing process, save materials and processing time, such as rolling bearing rings, jackets, etc., has been widely used to manufacture steel pipe.

Widely used for liquid, gas, and steam services both above- and below ground services.

Standard of carbon seamless steel pipe

ASTM A53 Gr.B Black and hot-dipped zinc-coated steel pipes welded and seamless
ASTM A106 Gr.B Seamless carbon steel for high temperature service
ASTM SA179 Seamless cold-drawn low-carbon steel heat exchanger and condenser tubes
ASTM SA192 Seamless carbon steel boiler tubes for high pressure
ASTM SA210 Seamless Medium-carbon boiler and superheater tubes
ASTM A213 Seamless alloy-steel boiler, superheater, and heat-exchanger tubes
ASTM A333 GR.6 seamless and welded carbon and alloy steel pipe intended for use at low temperatures.
ASTM A335 P9,P11,T22,T91 Seamless ferritic alloy-steel pipe for high-temperature service
API Spec 5CT J55/K55/N80/L80/P110/K55 Seamless steel pipe for casing
API Spec 5L PSL1/PSL2 Gr.b, X42/46/52/56/65/70 Seamless steel pipe for line pipe
DIN 17175 Seamless steel tube for elevated temperture
DN2391 Cold drawn seamless prevision pipe
DIN 1629 Seamless circular unalloyed steel tubes subject to special requirements
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