Tube d'acier ERW HFI EFW
ERW: tuyau soudé par résistance électrique
HFI: tuyau de soudure par induction haute fréquence
EFW: tuyau soudé par fusion électrique
Norme: API 5L, API 5CT, ASTM 53, EN10217, DIN 2458. IS 3589, JIS G3452, BS1387
Certificat: API 5L PSL1 / PSL2, API 5CT
Diamètre extérieur: 21,3 mm - 610 mm
Épaisseur de paroi: 1,8 - 22 mm
Longueur: 0,3 - 12m
Nuance d'acier: API 5L: GR B, X42, X46, X56, X60, X65, X70
ASTM A53: GR A, GR B, GR C
EN: S275, S275JR, S355JRH, S355J2H
Go: Q195, Q215, Q235, Q345, L175, L210, L245, L320, L360-L555
Surface: revêtement époxy de liaison par fusion, époxy de goudron de houille, 3PE, revêtement Vanish, revêtement de bitume, revêtement d'huile noire selon l'exigence du client
Test: analyse des composants chimiques, propriétés mécaniques (résistance à la traction ultime, limite d'élasticité, allongement), propriétés techniques (test d'aplatissement, test de flexion, test de soufflage, test d'impact), inspection de la taille extérieure, test hydrostatique, test aux rayons X.
Certificat d'essai de moulin: EN 10204 / 3.1B
Utilisation: utilisé pour la livraison de liquide à basse pression, comme l'eau, le gaz et l'huile. Forage pétrolier et fabrication de machines, etc.
EFW pipe vs ERW pipe
Electric Fusion Welding (EFW steel pipe) refers to an electron beam welding, the use of high-speed movement of the electron beam directed impact kinetic energy is converted to heat the workpiece so that the workpiece leaving the melt, the formation of the weld.
It is mainly used for welding dissimilar steel welding sheet or which high power density, metal weldment can rapidly heated to high temperatures, which can melt any refractory metals and alloys. Deep penetration welding fast, heat-affected zone is extremely small, so small performance impact on the joints, the joint almost no distortion. But it has a requirement on a special welding room because welding using X-rays.
Electric Resistance Welding (ERW steel pipe): welding member combination is applying pressure through the electrodes, the use of current through the joint area of the contact surface and the adjacent heat generating resistance welding process method, Also known as contact welding. It has excellent toughness and dynamic load strength, welding deformation.
Commonly used spot welding, seam welding and butt three.
ERW pipe manufacturing process includes HFW. ERW have low, medium, high frequency welding processes, and HFW is specially for high-frequency electric resistance welding. The differences between ERW and HFW steel pipe, is EFW is a type of ERW process for ordinary and thin-wall thickness steel pipes.ERW pipe: Electric Resistance Welded Pipe
HFW pipe: High Frequency Welding pipe
