Seamless steel pipe production process

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Product Detail

Process

Standard

Size

Seamless Steel Pipe, Carbon Seamless Steel Pipe(CS), Stainless Seamless Steel Pipe(SS) and Other Pipe Fittings.


Top quality–HydralicTest, X-ray, Off-line UT, Eddy Current Inspection, etc, 3rd party inspection to test.

Fast delivery–Many sets of advanced production equipment to produce, as well as perfect logistics system.

Timely quotation–professional sales quote for you after receive your inquiry.

Certificate share–MTC, ISO, Inspection Report and other quality certification.

Used for oil and gas transportation, the general structure, mechanical structure.

 

Types of Seamless Steel Pipe

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Size: OD 13.72-914.4mm / WT 1.65-22mm

Length: 0.5mtr-20mtr

 

Standard: API5L, ASTM A106/A53, DIN2391, ASTM A179/A192, EN10210, EN10208

Material: GR.BX42, X46, X52, S355JOH, S355J2H, 10#, 20#, 316L, 30

 

Heat treatment: Annealed, Normalized, Stress relieved, Cold finished, Quenched and Tempered

Delivery Condition: BKS, NBK, BK, BKW, GBK(+A), NBK(+N), BK(+C)

 

Test: Chemical Component Analysis, Mechanical Properties and other inspection

Third Inspection: BV, SGS, Llods ect.

Pipe ends: with plain ends, with beveled ends, profiled

Coatings and linings: bared and coated

 

Dimension Tolerances of Seamless Steel Pipe

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  • Hot Rolled Process for Seamless Steel Pipe

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    Cold Drawn Process for Seamless Steel Pipe

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    Cold Drawing

    The process of cold drawing is a procedure by which steel profiles are formed in order to achieve complex cross sections of excellent precision in these cold drawn steel shapes. After careful pre-treatment and de-scaling, the special profile bars are drawn through a forming die. This operation can be repeated up to three or four times. Cold drawing of hot rolled and hot extruded special pre- shape steel profiles tightens the cross-sectional tolerances, thus leading to significant improvement in dimensional accuracy and surface quality. Cold drawn steel special profiles offer the same precision achieved by machining but without the waste.

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    Hot Rolling

    During the production of special hot rolled steel profiles by hot rolling the input billet or slab is formed into lengths up to 70 m using two oppositely rotating cylindrical rolls. The hot rolled steel shapes of this forming technique are used in a multitude of industrial applications. Hot rolled special profiles offer innovative solutions whether it be for automotive, materials handling, railroad or thicker flange and web thickness structural steel shapes use. Finished hot rolled steel shapes are roller straightened and sheared into production lengths or sawn into fixed lengths according to customer wishes.

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    Hot Extruding

    During hot extrusion a round steel billet is pre-heated and, after leaving the furnace, is pushed through a forming die into a profile bar using a ram with an extrusion force of 2,200 ton. Hot extrusion offers substantial advantages in comparison to hot rolling forging or machining. Hot extrusion can be used to make complex profile shapes even using metals which are difficult to form. In addition, small lot sizes can be produced economically.

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    Cold Rolling Cold Forming Roll Forming

    Roll forming can be described as a continuous bending operation done at room temperature in which sheet or strip metal is plastically deformed along a linear axis. Tandem sets of rolls (known as roll stations) shape the metal stock in a series of progressive stages until the desired cross-sectional configuration is obtained by cold rolling.Roll forming is ideal for producing parts with long lengths or in large quantities. It can also produce multiple length parts from the same set of tooling. Virtually any material that can be cold formed by sheet forming techniques can be roll formed.

     

    Available Quality Standards

    API Standard:

    API 5L Line Pipe for pipeline transportation systems

    API 5CT tubing for wells

    API 5CT casing for wells

    API 5DP Drill Pipe for well drilling

     

    ASTM Standard:

    ASTM A53 used as structural steel or for low-pressure plumbing.

    ASTM A106 seamless carbon steel pipe for high-temperature service

    ASTM A335 for seamless ferritic alloy-steel pipe for high-temperature service

    ASTM A213 for seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes

    ASTM A179 for seamless Co Id-drawn low-carbon steel heat-exchanger and condenser tubes ASTM A192 for seamless carbon steel boiler tubes for high-pressure service

    ASTM A210 for seamless medium-carbon steel boiler and superheater tubes

    ASTM A333 for seamless steel pipe for low-temperature service and other applications with required notch toughness

    ASTM A519 for seamless carbon and alloy steel mechanical tubing

    ASTM A252 for seamless and welded steel pipe piles

     

    DIN Standard:

    DIN 17175 for heat resistant seamless steel pipe lines

    DIN 1629 for seamless circular tubes of non alloys steels wth special quality requirements

    DIN 2391 for cold drawn or cold rolled precision seamless steel tubes

     

    JIS Standard:

    JIS G3454 seamless carbon steel pipe for pressure service

    JIS G3456 seamless carbon steel pipe for high temperature service

    JIS G3461 seamless carbon steel pipe for boiler and heat exchanger

     

    EN Standard:

    EN 10210 for hot finished seamless structural hollow sections of non-alloy steels

    EN 10216 seamless steel tubes for pressure purposes

     

    BS Standard:

    BS 3059 for carbon.alloy and austenitic stainless steel tubes with specified elevated temperature properties

    Dimensions and Specification of Seamless Steel Pipe

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