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XANGAI TOP STEEL CO., LTD.
Phone: 86-21-68415567
Phone: 86-21-68415587
Correu electrònic: info@topsteelpipe.com
Fax: 86-21-68415587-8002

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últimes Notícies

How to choose high quality straig...
When choosing a straight seam steel pipe, we must first pay attention to the material. When we inspect the goods, we must first determine whether the material is qualified. The second is to see if the wall thickness of the straight seam steel pipe reaches the required wall thi...
Welded steel pipe standards
Welded steel pipe, also called welded pipe, is a steel pipe made by welding steel plates or steel strips after being crimped. The production process of welded steel pipe is simple, the production efficiency is high, there are many varieties and specifications, and the equipmen...
Large diameter spiral pipe
Large-diameter spiral steel pipe is that spiral pipe that use steel strip coil as raw material, often warm extrusion molding, two-wire double-sided submerged arc welding(dsaw) process automatically welded, raw material is strip volume, wire, flux. The input to go through need ...
HOW TO MEASURE THE LENGTH OF THE ...
According to the technical requirements of different manufacturers, steel length measuring system has a variety of methods. Mainly as follows: 1,grating length measurement The basic principle is: set two fixed-length steel grating in the outer ends of each pipe, use rod I ess ...
ERW pipe weld surface
High-frequency electric resistance welding (ERW) steel pipe production, internal weld surface treatments are generally incomplete curettage (left weld reinforcement) and complete curettage (scraping will form the inner surface of the groove) in two ways, and the results were n...

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