Tubo ERW

The nomenclature ERW refers to a specific type of welding process that involves both spot and seam welding. Seam welding is commonly used during the manufacturing of round, square and rectangular steel tubing. The steel strip is unwound from coils and side-trimmed to control width and condition the edges for welding. The strip then passes through a series of contoured rollers which cold-form the material into a circular (square or rectangular) shape. The edges are forced together under pressure as a butt joint and then welded by heating the material to temperatures above 2000° F. The flash weld that has formed is now removed from the outside diameter of the tube. Once the weld has been tested the tube then passes through a series of sizing rolls to attain its precise finished size, after which the tube is then straightened and cut to length. The material used in the manufacturing process is typically SAE 1010. This product is typically available in Cold Rolled steel (CREW) for 0.060” wall and lighter and Hot Rolled steel (HREW) for 0.083” wall and heavier. The product will come in an “as-welded” condition, (often called – flash-in condition) referring to when the flash from the weld is left on the inside of the tubing, it is not normally removed or controlled during the ERW tube production process.

Technically, DOM is not a type of steel tube, but rather the process in which the tube is finished. It is considered a high quality tube, and is normally constructed from SAE 1020 or 1026 steel. The first stages of manufacturing are identical to ones used to make electric resistance welded tube, but in the finishing stages the entire flash weld is removed and the tube is cold drawn over a mandrel. The cold drawn process provides the tube with better dimensional tolerances, improved surface finish and the strongest weld strength achievable. DOM is often incorrectly referenced as “seamless tube” when it actually does have a seam (although it is almost invisible).

Descripción arancelaria
Codificación arancelaria	Descripción
Capítulo 72	Fundición, hierro y acero.
Partida 7210	Productos laminados planos de hierro o acero sin alear, de anchura superior o igual a 600 mm, chapados o revestidos.
Subpartida 7210.30	-- Cincados electrolíticamente.
Fracción 7210.30.01	Láminas cincadas por las dos caras.
Fracción 7210.30.99	Los demás.
Subpartida 7210.41	-- Ondulados.
Fracción 7210.41.01	Láminas cincadas por las dos caras.
Fracción 7210.41.99	Los demás.

erw

erw1 ¿P: ¿ cuál es el nombre de tu empresa?
R: puxin Metal Products Guangdong co., Ltd.
¿P: ¿ puedo revisar su fábrica?
R: por supuesto, bienvenido a cualquier momento.
¿P: ¿ puedo personalizar el producto?
R: el volumen mínimo de pedidos supera las 10 toneladas, y podemos cumplir con sus requisitos de personalización.
¿P: ¿ cómo puedo confiar en ti?
R: creemos que la honestidad es la vida de nuestra empresa. además, Alibaba ofrece garantías comerciales y su pedido y financiación estarán bien garantizados.
¿P: ¿ cuál es su tiempo de entrega?
R: determinamos el tiempo de entrega en función de la cantidad del producto, y puede consultarnos la respuesta.