GOST 8732-78. Pipes, steel, seamless, hot-deformed. Assortment

Are you interested in GOST 8732−78 «Pipes made of steel seamless hot-deformed» from Avek Glob? We guarantee high quality products and a large selection of rolled metal products with worldwide delivery.

Application area

This standard applies to hot-formed seamless steel pipes of general purpose, manufactured according to the external diameter, wall thickness and length.

Assortment and sizes

GOST 8732−78 sets the range of sizes of seamless hot-deformed steel pipes from 20 to 550 mm, with a wall thickness range from 2.5 to 75 mm.

The length of the pipe should be:
Unlimited length — in the range from 4 to 12,5 m;
dimensional length — within the immeasurable;
length of a multiple dimensional — within an unlimited length with an allowance for each cut of 5 mm;
approximate length within an unlimited length.

Notes:

According to the manufacturer’s agreement with the consumer it is allowed to make pipes with a length exceeding the limits specified for pipes of unlimited length.

For pipes with a wall thickness of more than 16 mm, the length of the measuring pipes is established by the manufacturer’s agreement with the consumer.

Pipes of approximate length are manufactured at the request of the consumer.
Material

GOST 8732−78 provides for the production of hot-rolled seamless pipes of steels of grades 10, 20, 35, 45, 10Г2, 15Х, 20Х, 40Х, 30ХГСА, 15ХМ, 09Г2С.

Supplier — AvekGlob Company — offers at a reasonable price from the manufacturer a diverse range of cold-formed seamless pipes that meet the technical requirements of domestic and foreign standards. The supplier guarantees the timely delivery of products to any address specified by the consumer.

Technical requirements

Pipes are manufactured with subsequent heat treatment. It is allowed to produce products without heat treatment, but in this case the ratio of the wall thickness to the outer diameter should be more than 50 or the thermal treatment is excluded at the request of the customer.

On the surface of pipes there should be no cracks, sunsets and other defects. Small necks, scales and other irregularities that do not interfere with inspection are allowed. Trace marks should not display pipe dimensions beyond the limit values. At the request of the customer, the surface of the pipes can be cleaned of scale.

According to the manufacturer’s agreement with the customer, the pipes can be manufactured with combined limiting deviations, for example: on the outer diameter of increased accuracy in accordance with GOST 9567−75, and on the wall thickness — conventional accuracy, etc.

Ovality and the difference in the pipes should not lead to the size of the pipes for the maximum deviations in diameter and wall thickness.

The curvature of any section of the pipe per 1 m of length should not exceed 1.5 mm — for pipes with a wall thickness of up to 20 mm; 2,0 mm — for pipes with a wall thickness exceeding 20 to 30 mm; 4.0 mm — for pipes with a wall thickness exceeding 30 mm.

At the customer’s request, the pipes must be supplied by the inner diameter and the wall thickness, as well as by the outer and inner diameters and by the difference.
The maximum deviations in the internal diameter for pipes with a diameter of 70−203 mm, a wall of 7−20 mm and a ratio of diameter to wall thickness equal to or less than 10, shall not exceed the corresponding limiting deviations in the external diameter specified in the table:

For other pipe sizes, the maximum deviation in the internal diameter is determined by the manufacturer’s agreement with the consumer.

Supplier — AvekGlob Company — offers to purchase various profiles from seamless hot-deformed pipes that meet technical standards and quality requirements. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.