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Shandong Xinhe International Trade Co., Ltd. introduced welded pipe, welded steel pipe is also known as welded pipe, is made of steel plate or strip after crimping forming welded steel pipe, general length 6 meters. Welded steel pipe production process is simple, high production efficiency, variety of specifications, less investment in equipment, but the general strength is lower than seamless steel pipe.

Raw material uncoiling -- leveling -- end cutting and welding -- lobbing -- forming -- welding -- internal and external bead removal -- pre-correction -- induction heat treatment -- sizing and straightening -- eddy current testing -- cutting off -- water pressure inspection -- pickling -- final inspection (strict control) -- packaging -- shipment.

There are many kinds of quality inspection methods for straight seam welded pipe, among which physical method is also commonly used. Physical inspection is to use some physical phenomena to measure or inspect the method. Nondestructive testing is generally adopted. The current NDT includes magnetic NDT, ultrasonic NDT, ray NDT, penetration NDT, etc.