2021 China New Design Stainless Steel Welded Pipe - Spiral Seam Steel Pipe – JINBAICHENG
2021 China New Design Stainless Steel Welded Pipe - Spiral Seam Steel Pipe – JINBAICHENG Detail:
Production Process
(1) Raw materials are strip steel coils, welding wires, and fluxes. Strict physical and chemical inspections are required before investment.
(2) Butt joint of strip steel head and tail, adopt single wire or double wire submerged arc welding, after coiling into steel pipe, adopt automatic submerged arc welding to repair welding.
(3) Before forming, the strip undergoes leveling, edge trimming, edge planing, surface cleaning and conveying, and pre-bending treatment.
(4) The electric contact pressure gauge is used to control the pressure of the cylinders on both sides of the conveyor to ensure the smooth conveying of the strip.
(5) Adopt external control or internal control roll forming.
(6) The welding seam gap control device is used to ensure that the welding seam gap meets the welding requirements, and the pipe diameter, the amount of misalignment and the welding seam gap are all strictly controlled.
(7) Both internal welding and external welding adopt American Lincoln electric welding machine for single-wire or double-wire submerged arc welding, so as to obtain stable welding quality.
(8) The welded seams are all inspected by an online continuous ultrasonic automatic flaw instrument, which guarantees 100% non-destructive testing coverage of spiral welds. If there is a defect, it will automatically alarm and spray the mark, and the production workers can adjust the process parameters at any time according to this to eliminate the defect in time.
(9) Air plasma cutting machine is used to cut the steel pipe into individual pieces.
(10) After cutting into single steel pipes, each batch of steel pipes must undergo a strict first inspection system to check the mechanical properties, chemical composition, fusion status of the welds, the surface quality of the steel pipes and pass non-destructive inspections to ensure that the pipe-making process is qualified. After that, it can be officially put into production.
(11) The parts with continuous sonic flaw detection marks on the weld are re-examined by manual ultrasonic and X-ray. If there is a defect, after repairing, it will go through non-destructive inspection again until it is confirmed that the defect has been eliminated.
(12) The pipes where the strip steel butt welding seams and the D-shaped joints intersecting the spiral welding seams are all inspected by X-ray television or filming.
(13) Each steel pipe undergoes hydrostatic pressure test, and the pressure adopts radial seal. The test pressure and time are strictly controlled by the steel pipe hydraulic microcomputer detection device. The test parameters are automatically printed and recorded.
(14) The pipe end is mechanically processed, so that the verticality of the end face, the bevel angle and the obtuse edge can be accurately controlled.
Product Display
Product Usage
Spiral steel pipes are mainly used in water supply engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, and urban construction. It is one of the twenty key products developed in my country.
Used for liquid transportation: water supply and drainage. Used for gas transportation: coal gas, steam, liquefied petroleum gas. For structural purposes: as piling pipes and bridges; pipes for docks, roads, and building structures.
Material
Q235A, Q235B, 10#, 20#, Q345(16Mn), L245(B), L290(X42), L320(X46), L360(X52), L390(X56), L415(X60), L450(X65), L485(X70), L555(X80)
L290NB/MB(X42N/M), L360NB/MB(X52N/M), L390NB/MB(X56N/M), L415NB/MB(X60N/M), L450MB(X65), L485MB(X70), L555MB(X80)。
Product detail pictures:
Related Product Guide:
We thinks what clients think, the urgency of urgency to act from the interests of a client position of theory, allowing for greater quality, lessen processing costs, price ranges are much more reasonable, won the new and outdated shoppers the support and affirmation for 2021 China New Design Stainless Steel Welded Pipe - Spiral Seam Steel Pipe – JINBAICHENG , The product will supply to all over the world, such as: USA, Iraq, South Korea, With high quality, reasonable price, on-time delivery and customized & customized services to help customers achieve their goals successfully, our company has got praise in both domestic and foreign markets. Buyers are welcome to contact us.
By June from Munich - 2017.03.28 16:34
As an international trading company, we have numerous partners, but about your company, I just want to say, you are really good, wide range, good quality, reasonable prices, warm and thoughtful service, advanced technology and equipment and workers have professional training, feedback and product update is timely, in short, this is a very pleasant cooperation, and we look forward to the next cooperation!
By Dale from Madagascar - 2018.07.27 12:26