GOST 8696: Welded Spiral Steel Pipe

GOST 8696 is a standard developed by the Euro-Asian Council for Standardization, Metrology, and Certification (EASC), a standardization organization for countries from the former Soviet Union. Specifically, GOST 8696 covers electrically welded steel pipes with a spiral seam.

Here are some key features and specifications of GOST 8696 pipes:

1. Production and Design

GOST 8696 pipes are manufactured using an electrical welding process. The manufacturing process involves forming a steel strip into a spiral and then welding the seam to create a pipe. This design provides a balance of strength and flexibility, making these pipes suitable for a variety of applications.

2. Dimensions

The standard covers pipes with an outer diameter ranging from 159 mm to 3,200 mm and wall thickness from 4 mm to 20 mm. The specific sizes are further divided into several categories – small, medium, and large diameter pipes.

3. Applications

Electrically welded steel pipes with a spiral seam under the GOST 8696 standard are typically used for transporting oil, gas, water, and other fluids. They can also be used in construction for structural purposes due to their strength and durability.

4. Testing

The standard requires various tests to ensure the quality and reliability of the pipes. These include mechanical tests (such as tensile and impact tests), non-destructive tests (such as ultrasonic and radiographic tests), and hydrostatic tests to verify the pipe’s pressure resistance.

5. Classification

GOST 8696 pipes are classified based on their purpose (general purpose, for water, and gas supply, etc.), manufacturing method (electrically welded), and seam type (spiral seam).

6. Marking

Each pipe should be marked with the manufacturer’s mark, standard number (GOST 8696), pipe size (diameter and wall thickness), steel grade, and batch number.

In conclusion, GOST 8696 electrically welded steel pipes with a spiral seam are essential components in various industrial sectors, especially in fluid transportation and construction. Their strength, reliability, and flexibility make them suitable for a wide range of applications.

gost-8696-74 welded spiral steel pipe specifications

What are some common steel grades used in GOST 8696: Welded Spiral Steel Pipe ?

The GOST 8696: Welded Spiral Steel Pipe with a spiral seam does not specify any particular steel grades. Instead, the choice of steel grade typically depends on the specific application of the pipe, the operating conditions it will be exposed to, and the requirements for its mechanical properties.

However, some common steel grades that are often used for welded steel pipes in the Russian standard (GOST) system include:

• St2sp: This is a carbon steel grade used for general purposes. It has good weldability and is often used for manufacturing pipes that don’t require high strength or toughness.
• St3sp: Another general-purpose carbon steel grade, St3sp has slightly higher mechanical properties compared to St2sp. It’s commonly used in construction and other structural applications.
• 09G2S: This is a low-alloy steel grade that offers higher strength and toughness compared to carbon steels. It’s often used for pipes that need to withstand higher pressures or more demanding operating conditions.
• 17G1S: This is a low-alloy, high-strength steel grade that’s used for manufacturing pipes for high-pressure applications. It offers excellent weldability and good toughness.

Keep in mind that these are just a few examples, and many other steel grades can also be used depending on the requirements. The choice of steel grade should always consider the pipe’s intended use, the environmental conditions it will be exposed to, and the required mechanical properties.