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Seamless Hot-Deformed Large-Diameter Steel Pipes as per GOST 8732

Seamless steel pipes are used in fuel and energy plants, shipbuilding, aircraft engineering and mechanical engineering industries as well as construction of water, gas and oil pipelines.

Hot-deformed seamless conventional pipes manufactured from carbon and alloy steel with outer diameter varying from 168 mm to 426 mm, wall thickness and length in accordance with GOST 8731-78 are classified under this type of metal rolled products.

трубы бесшовные гдAccording to the length, seamless pipes as per GOST 8732 are manufactured as follows:

  • off-gauge length - from 4m to 12.5m;
  • specific cut length - within the limits of off-gauge length;
  • length divisible by the length of cut - within the limits of off-gauge length with 5mm allowance per cut;
  • approximate length - within the limits of off-gauge length.

Deviations in length of seamless hot-deformed pipes of specific cut and multiple lengths shall not exceed +10 mm - for the length up to 6 m; +15 mm - for the length exceeding 6 m or outer diameter exceeding 152 mm.

According to quality standards, seamless hot-deformed pipes as per GOST 8732 are divided into the following groups:

  • A - pipes with standardization of mechanical properties manufactured from the following steel grades: Ст2сп, Ст4сп, Ст5сп, Ст6сп as per GOST380-88;
  • B - pipes with standardization of chemical analysis, from steel grades according to GOSTs380, 1050,4543, and GOST19281;
  • C - pipes with standardization of mechanical properties and chemical analysis, from steel grades according to GOSTs380, 1050,4543, and GOST19281;
  • трубы бесшовныеD - pipes with standardization of chemical analysis, from steel grades according to GOSTs1050,4543 and19281, including control of mechanical properties using heat treated samples. Norms of mechanical properties of hot-deformed seamless pipes shall comply with those specified in standards for steel;
  • E - pipes are supplied only with standardization of hydraulic test pressure.

Seamless hot-deformed pipes are often supplied with structural steels: 20, 15, 10 are the steel grades which are characterized by low hardness and high viscosity. Seamless steel pipes supplied with these steel grades are usually used at non-critical facilities.

These pipes are manufactured from ingots, rough forges, stripped, predrilled billets, EShL and VDP ingots in accordance with the requirements of the standard, or the customer, with 100% non-destructive testing, heat treatment, hydrotests, and a hydrotesting guarantee.

WE WILL DELIVER NEW SEAMLESS PIPES AS PER GOST 8732-78 AT PRICES WHICH ARE LOWER THAN MANUFACTURER PRICES.

The latest details on price and availability of products are available from our company managers by telephone:
+7 (351) 211-00-70, 211-00-80 or by e-mail: upsk@uralpsk.ruk.fomin@uralpsk.ru