Les exigences de qualité des tubes carrés galvanisés sont très élevées. Cependant, en raison des inévitables défauts de qualité correspondants dans chaque processus de production de tubes en acier, et certains tubes en acier sont en service dans des conditions environnementales spéciales, en plus de la performance globale du tube en acier, la précision du diamètre extérieur et de la paroi [...]
Les problèmes courants se répartissent grosso modo en trois types, à savoir l'enrobage inégal, l'égouttement des conservateurs et la formation de mousse sur les conservateurs. 1. Revêtement inégal. La manifestation fondamentale de ce type de problème est que l'agent de conservation est réparti de manière inégale sur la surface du tuyau en acier. Certaines parties sont recouvertes d'une couche trop épaisse, tandis que d'autres sont [...]
Le feuillard d'acier galvanisé est traité par décapage, galvanisation, emballage et autres procédés. Il est largement utilisé en raison de ses bonnes performances anticorrosion. Il est principalement utilisé pour fabriquer des produits métalliques qui sont travaillés à froid et qui ne sont plus galvanisés. Par exemple : des produits métalliques tels que des quilles en acier léger, des colonnes en forme de pêche pour les garde-corps, des éviers, des [...]
In order to prolong the service life of pipelines, pipeline anti-corrosion construction has become an indispensable process in the pipeline production process; with the continuous development and production of manufacturers, various types of anti-corrosion spiral steel pipes have appeared on the market. The more common anti-corrosion types of spiral steel pipes on the market are: […]
The plastic-coated composite pipe is made of welded steel pipe as the base material, and is made by sandblasting chemical double pretreatment, preheating, plastic coating, curing, post-treatment and other processes. It has excellent comprehensive properties, strong mechanical corrosion resistance, good chemical stability and water resistance, and has functions such as corrosion resistance, pressure resistance, and […]
3PE Coating standard are ANSI/AWWA C104/A21.4 American National Standard for Cement-Mortar Lining for Ductile-Iron Pipe and Fittings for Water, ISO 21809 Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems, DIN 30670 Polyethylen coatings of steel pipes and fittings. The normal bare pipe will be corroded in […]
The base material of 3PE anti-corrosion steel pipe includes seamless steel pipe, spiral steel pipe and straight seam steel pipe. The three-layer polyethylene (3PE) anti-corrosion coating has been widely used in the oil pipeline industry due to its good corrosion resistance, water vapor resistance and mechanical properties. The anti-corrosion layer of 3PE anti-corrosion steel pipe […]
According to API5L, GB/T9711.1 pipeline steel pipe performance requirements, according to the different tempering temperature, tempering can be divided into the following: 1. Low temperature tempering (150-250 degrees) The microstructure obtained by low temperature tempering is tempered martensite. The purpose is to reduce the quenching stress and brittleness of the quenched steel on the premise […]
Application: Used for gas, water and oil transportation in petroleum and natural gas industry API SPEC 5L-2011 (Pipeline Specification), developed and published by the American Petroleum Institute, is used worldwide. The main material of the tube is L245, L290, L360, L415, L480, GR.B, X42, X46, X56, X65, X70, X80, X100 and other steel grade.
1. It is generally suitable for welding of thin steel pipe below 6mm, with the characteristics of beautiful and elegant weld molding and small welding deformation.2. The maintenance gas is argon with the purity of 99.99%. When the welding current is 50-50A, the argon flow rate is 8-10L/min, and when the current is 50-250A, the […]
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