Spiral steel pipe for Low Pressure Fluid transportation

The spiral welded pipe for low-pressure liquid transportation is a steel pipe used to transport low-pressure fluids such as water, sewage, air, and heating steam. This kind of steel pipe is welded by spiral forming and automatic submerged arc welding, which has the characteristics of relatively low manufacturing cost and high production efficiency.

The spiral welded pipe for low-pressure liquid transportation is a steel pipe used to transport low-pressure fluids such as water, sewage, air, and heating steam. This kind of steel pipe is welded by spiral forming and automatic submerged arc welding, which has the characteristics of relatively low manufacturing cost and high production efficiency. Here is some key information about spiral welded pipe for low-pressure liquid transfer:

Size and shape: The size series of spiral welded pipes will be adjusted according to relevant standards to meet different application requirements.

Technical requirements: The technical requirements for spiral welded pipes include manufacturing methods, steel types, chemical composition, mechanical properties, hydrostatic testing, non-destructive testing, appearance quality, etc.

Manufacturing method: Usually hot-rolled steel strips are used to make pipe blanks, which are spirally formed at room temperature, and the spiral seams are welded by automatic submerged arc welding.

Type of steel: Steel that complies with national standards should be used, such as Q195, Q215 and Q235 steel in GB/T 700--1988. Other steel types with good welding performance can also be used according to the agreement.

Non-destructive inspection: The repair welds of steel pipes, steel strip butt welds and circumferential welds should be inspected by X-ray or ultrasonic to ensure the quality of the welds.

Appearance quality: The surface of the steel pipe should be smooth, and defects such as cracks, scars, folds, etc. are not allowed. Defects whose depth cannot be determined should be completely removed by grinding.

Hydrostatic pressure test: Each steel pipe should be subjected to a hydrostatic pressure test to ensure that there is no leakage. The test pressure is calculated and determined according to the formula.

Standards: The production and inspection of spiral welded pipes for low-pressure fluid transportation should follow national standards, such as GB/T 3091-2015, etc. These standards stipulate the size, shape, weight, technical requirements, etc. of steel pipes.

Scope of application: Suitable for low-pressure fluid transportation pipelines such as water, sewage, air, heating steam, etc., and can also be used for other fluid transportation pipelines with similar requirements.

Quality certificate: Before the spiral welded pipe is delivered for use, a quality certificate should be provided to prove that it meets the requirements of relevant standards.

In summary, spiral welded pipes for low-pressure liquid transportation have been widely used in the field of low-pressure fluid transportation due to their economy and adaptability. Relevant national standards must be strictly followed during manufacturing and use to ensure product quality and safety.