5.The classification of roller forming methods for longitudinal welded pipes includes three main categories: phased forming, natural forming, and vertical roller forming. Phased forming involves a series of die rolls arranged longitudinally. It can be further categorized based on transverse forming characteristics and longitudinal forming characteristics of the pipe blank. Transversely, it includes edge bending, center bending, circumferential bending, and double-radius die bending. Longitudinally, it includes uphill forming, downhill forming, bottom line horizontal forming, and edge line horizontal forming. Advancements in phased forming methods, such as W-reverse bending and F.F forming, contribute to improved longitudinal welded pipes forming quality. Natural forming, also known as edge roller forming, controls edge extension by configuring roller groups along the outer edge of the pipe blank. It absorbs edge extension as compressive deformation, making it suitable for large-diameter thin-walled pipes.
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Length: Random length,fixed length Usage: mechanical tubing,oil casing,low pressure boiler etc 2. Alloy Pipes and Stainless Steel Pipes: OD: 1/4”-42” WT: 1.25mm-100mm ASME SA-213M: T5, T9, T11、T12、T22、T23、T91 ASME SA-335M: P5、P9、P11、P12、P22、P23、P91、P92 ASTM A312: TP304/L, 310S, TP316/L, TP317/L, TP321, TP347/H41 WT: 1.25mm-50mm Standard : API 5L, ASTM A53, ASTM A106, EN10210, EN10025 Steel Grade: Grade A,B,X42,X46,X52,X60,X65,X70,ST52,S235JRH,S355JRH,E235,E355
Stainless coil, sheet, strip & plate,wire rod/bar Standard: ASTM A240/A480, JIS G4305/G4304, EN 10088-2 Grade: 201, 202, 304, 304L, 316L, 430… etc Surface: No.ONE, 2B, BA, No.3, No.4, No.5, HL, No.8, SB, Ethed,Embossed,Color,Mirror Thickness: O.10 ~ 5.O mm (CR), 3.O ~ 120.O mm (HR) Width: 4.O ~ 1524 mm(CR), 600-2,800mm(HR)
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