Spiral steel pipe process

Process Flow of Spiral Steel Pipes

Spiral steel pipes are a kind of economic cross section steel, which is widely used in fluid transportation pipelines such as petroleum, natural gas, water and some solid materials. The manufacturing process of spiral steel pipes is relatively complicated. The following is a brief introduction to the process flow of spiral steel pipes:

1. Raw material inspection:In the production process of spiral steel pipe, first check the raw materials. The steel grades and specifications of these materials required must meet the technical requirements before they can be used;

2. Uncoiling and leveling:In the production process of spiral steel pipe, the steel plate is uncoiled, then the steel plate is flattened, and the winder is removed to make the steel plate more even and straight;

3. Edge shearing:In the production process of spiral steel pipe, the steel plate is sheared from the edge of the steel plate. After the edge shearing, the steel plate is cut into a certain width;

4. Spiral forming:In the production process of spiral steel pipe, a forming machine is used to continuously form a steel strip into a spiral shape according to a predictable gap;

5. Welding:In the production process of spiral steel pipe, welding is generally used for welding, that is, the welding head is round, butt connection and other welding process parameters must be strictly controlled in order to ensure the strength of the welding seam;

6. X-ray Inspection:In the production process of spiral steel pipe, an X-ray inspection is carried out to check whether there is a lack of weld, porosity or other defects in the weld;

7. Hydraulic testing:Hydraulic testing is generally carried out in the production process of spiral steel pipe. The test pressure and testing time are determined according to the standard requirements;

8. Polishing Process:In the production process of spiral steel pipe, the welded joints and the outside of the straight seam pipe need to be polished to improve the appearance quality of the steel pipe;

9. Finished product inspection:The production process of spiral steel pipe requires that the finished product must pass the inspection before it can be delivered. The main elements of the inspection are product specifications, appearance quality, hydraulic test performance, etc.

Overall, the production process of spiral steel pipe is relatively complicated. In the process, we must strictly control the production parameters and test marks to ensure product quality and ensure the safety of the pipeline application.

The production process of spiral steel pipes is actually a complex and precise process. Its main production process includes raw material inspection and selection, edge molding, welding, pipe hoop inspection, inspection and acceptance of welds and external surface, cutting and threading, product inspection, painting and auxiliary materials packaging, and packaging.

1. Raw material inspection and selection. The quality of the used raw materials is the key factor which influences the quality of the spiral steel pipes. After selecting the raw materials from the suppliers, the raw materials need to be inspected and approved according to their chemical composition, mechanical properties and inner flaws.

2. Molding of edges. Edging is a technique used to make the steel pipe edge flat and even. It is necessary to guarantee the quality of edging and welding.

3. Welding. The quality of welding affects the overall performance of the spiral steel pipe. Therefore, the spiral steel pipe must be welded with the most advanced welding techniques to ensure its excellent welding quality and performance.

4. Pipe hoop inspection. The inspection of pipe hoop refers to the measurement of the diameter, wall thickness and ellipticity of the spiral steel pipe. This stage is important to ensure that the spiral steel pipe meets the relevant industry standards.

5. Inspection and acceptance of welds and external surface. This stage is used to check whether the welding of the spiral steel pipe meets the requirements, and to inspect for external surface defects.

6. Cutting and threading. This stage is used to cut and thread the spiral steel pipe according to the required specifications.

7. Product inspection. The purpose of product inspection is to check whether the spiral steel pipe meets the requirements and standards of the industry.

8. Painting and auxiliary materials packaging. In this stage, the spiral steel pipes should be painted and the auxiliary materials should be packaged.

9. Packaging. The finished spiral steel pipes should be properly packaged before shipment. In order to ensure the quality of the products, the packaging process should be done in strict accordance with relevant regulations.