The nominal diameter of straight-seam steel pipe refers to the series of diameters specified in the standard of straight-seam steel pipe. For straight-seam steel pipes, pipe fittings, valves, etc., the series specified by the standard are used to indicate the nominal straight-seam steel pipe diamete

Product: Square steel pipe; Standard & Material: ASTM A53. The order is produced for industrial construction projects, by an Iran company, which has very strict technical requirements for the production of steel pipe and lists very detailed technical requirements. Threeway Steel also lived up to the

Oil casing can be roughly divided into one and surface casing according to different usage methods. Second, the middle casing. Third, the production of the casing. Fourth. Drilling casing. The surface casing is mainly: the casing head installed on the top and is used to suspend and support the subse

1. Downhill forming methodDownhill shaping of welded steel pipe equipment can significantly reduce edge extension.2. Increase the elongation in the middle of the billetDuring the forming process, the reduction of the opening hole pattern is increased, so that the gap between the upper and lower roll