Decorative Polished Stainless Steel Pipe Mirror Surface AISI SS 304 304L 316 316L
Welded steel pipe is referred to as welded pipe, and the steel pipe is usually welded after the unit and the
die are formed by crimping. The welded steel pipe has simple production process, high production efficiency, many varieties and specifications, and low equipment investment, but the general strength is lower than that of seamless steel pipe. Since the year 1930, with the rapid development of high-quality strip continuous rolling production and the advancement of welding and inspection technology, the quality of welded joints has been continuously improved, and the variety specifications of welded steel pipes are increasing, and in more and more fields, especially in Heat exchangers, spare tubes, decorative tubes, medium and low pressure fluid tubes, etc. instead of seamless steel tubes
Standard ASTM A554/EN10296-2:
Material grade: 201, 202, 304, 304L, 316, 316L
Dia: 6 ~ 1185mm.
Thk: 0.6 ~ 3.0mm.
Welding process: argon arc welding, plasma high frequency welding
Inspection method: appearance inspection, composition analysis
A. mirror 6K, 8K, bright surface (400---600#) light;
B. sand surface: sand number (180#, 240#, 320#), sand pattern (round sand, straight sand);
C. not Processing plain surface: stainless steel cold rolled bright surface.
Tolerance of OD and Thk.
|ASTM A554 Tolerance||OD(mm)||Tolerance(mm)||WT Tolerance|
|OD ≤ 12.7||±0.10||± 10%|
|12.7 < OD ≤ 25.4||±0.13|
|25.4 < OD ≤ 38.1||±0.20|
|38.1 < OD ≤ 50.8||±0.25|
|50.8 < OD ≤ 63.5||±0.30|
|63.5 < OD ≤ 88.9||±0.36|
|88.9 < OD ≤ 127||±0.51|
|127 < OD ≤ 190.5||±0.64|
|190.5 < OD ≤ 406||Each add 1", Grade ±0.03|