Welded Steel Pipe GB Standard

Welded steel pipes are made using flat steel plates or strips, and the manufacturing process creates seams in their pipe bodies. Specifically, when manufacturing welded steel pipes, steel sheets or strips are bent and then welded into circular, conventional pipe shapes or square shapes. Union Steel will introduce the GB standard for welded steel pipe in this passage.

1. GB/T3092-1993

Welded steel pipe for low-pressure fluid transportation, also known as general welded pipe, commonly known as clarinet pipe.

It is a welded steel pipe for conveying water, gas, air, oil and heating steam and other general lower pressure fluids. Steel pipes are divided into ordinary steel pipes and thickened steel pipes according to wall thickness; according to the pipe end form, they are divided into unthreaded steel pipes (smooth pipes) and threaded steel pipes. The specification of the steel pipe is expressed by the nominal diameter (mm), which is an approximate value of the inner diameter. It is customary to express it in inches, such as 11/2. Welded steel pipes for low-pressure fluid transportation are not only directly used for conveying fluids, but also widely used as primary pipes for galvanized welded steel pipes for low-pressure fluid transportation.

2. GB/T3091-1993

Galvanized welded steel pipe for low-pressure fluid transportation, also known as galvanized electric welded steel pipe, commonly known as white pipe.

Hot-dip galvanized welded (furnace welded or electric welded) steel pipes for conveying water, gas, air oil, heating steam, warm water and other generally lower pressure fluids or other purposes. Steel pipes are divided into ordinary galvanized steel pipes and thickened galvanized steel pipes according to wall thickness; according to the pipe end form, they are divided into unthreaded galvanized steel pipes and threaded galvanized steel pipes. The specification of the steel pipe is expressed by the nominal diameter (mm), which is an approximate value of the inner diameter.

3. GB3640-88

Ordinary carbon steel wire casing is a steel pipe used to protect wires in electrical installation projects such as industrial and civil construction, mechanical equipment installation, etc.

4. YB242-63

Straight seam electric welded steel pipe is a steel pipe whose weld seam is parallel to the longitudinal direction of the steel pipe. It is usually divided into metric electric welded steel pipes, electric welded thin-walled pipes, transformer cooling oil pipes, etc.

5. SY5036-83

The spiral seam submerged arc welded steel pipe is used for the pipeline of pressurized fluid transportation. The hot-rolled steel coil is used as the tube blank, which is usually spirally formed at high temperature and welded by double-sided submerged arc welding. It is used for pressurized fluid delivery. Spiral seam steel pipe. The steel pipe has strong pressure bearing capacity and good welding performance. After various rigorous scientific inspections and tests, it is safe and reliable to use. The diameter of the steel pipe is large, and the transportation efficiency is high, which can save the investment in laying pipelines. It is mainly used for pipelines transporting oil and natural gas.

6. SY5038-83

Spiral seam high-frequency welded steel pipes for pressurized fluid transportation use hot-rolled steel coils as tube blanks, are spirally formed at room temperature, and are welded by high-frequency lap welding. It is used for pressurized fluid delivery. Spiral seam high frequency welded steel pipe. The steel pipe has strong pressure bearing capacity, good plasticity, and is convenient for welding and processing. After various strict and scientific inspections and tests, it is safe and reliable to use. It is mainly used for laying pipelines for transporting oil and natural gas.

7. SY5037-83

Spiral seam submerged arc welded steel pipes for low-pressure fluid transportation generally use hot-rolled steel coils as tube blanks, often spirally formed, and adopt double-sided automatic forming submerged arc welding or single-sided welding. Submerged arc welded steel pipes for general low-pressure fluid transportation such as water, gas, air, and steam.

8. SY5039-83

Generally, spiral seam high-frequency welded steel pipes for low-pressure fluid transportation use hot-rolled steel coils as tube blanks, which are often spirally formed at high temperatures and welded by high-frequency lap welding. They are suitable for general low-pressure fluid transportation. High frequency welded steel pipe with seams.

9. SY5040-83

Spiral welded steel pipes for piles are made of hot-rolled steel coils, which are usually formed by warm spiral forming, and made by double-sided submerged arc welding or high-frequency welding. It is used for steel pipe foundation piles in civil and architectural structures, docks, bridges, etc.