What are the implementation standards for welded steel pipes?

Posted by zora li on February 21st, 2023

1. Welded pipe for low-pressure fluid transportation (GB/T3092-1993) is also called general welded pipe, commonly known as clarinet pipe.

It is a welded steel pipe for conveying general lower pressure fluids such as water, gas, air, oil and heating steam. 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 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. Galvanized welded steel pipe for low-pressure fluid transportation (GB/T3091-1993) is also called 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 their wall thickness; they are divided into unthreaded galvanized steel pipes and threaded galvanized steel pipes according to their end forms. 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 in inches, such as 11/2.

3. Ordinary carbon steel wire casing (GB3640-88) is a steel pipe used to protect wires in electrical installation projects such as industrial and civil construction, mechanical equipment installation, etc.

4. Straight seam electric welded steel pipe (YB242-63) 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. The spiral seam submerged arc welded steel pipe (SY5036-83) for pressurized fluid transportation is made of hot-rolled steel strip coils, spirally formed at room 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 steel pipe has a large diameter and high transportation efficiency, which can save the investment in laying pipelines. It is mainly used for pipelines transporting oil and natural gas.

6. Spiral seam high-frequency welded steel pipe for pressurized fluid transportation (SY5038-83) is made of hot-rolled steel coil as the tube blank, spirally formed at room temperature, and 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. Spiral submerged arc welded steel pipes for low-pressure fluid transportation (SY5037-83) generally use hot-rolled steel coils as tube blanks, often using spiral forming, 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. Generally, the spiral seam high frequency welded steel pipe for low pressure fluid transportation (SY5039-83) is made of hot rolled steel coil as the tube blank, which is usually spirally formed at high temperature and welded by high frequency lap welding. For general low pressure fluid delivery. High frequency welded steel pipe with seams.

9. Spiral welded steel pipe for piles (SY5040-83) is made of hot-rolled steel coil as the tube blank, often using warm spiral forming, and double-sided submerged arc welding or high-frequency welding. It is used for steel pipe foundation piles in civil structures, docks, bridges, etc.