ST52 Honed Seamless Steel Pipe for Hydraulic Cylinder
GB3087 Chinese national standard
GB5310 Chinese national standard
ASME SA210 Boiler and pressure vessel code of ASME
ASME SA213 Boiler and pressure vessel code of ASME
DINl7175 Deutsches industrial standard~
Application:
Used as the pipes on the heated side of low and medium pressure boilers(normally with operating pressure not higher than 5.88Mpa and
operating temperature below 450 oc);as the pipes on the heated sides of high·pressure boilers,economizers,overheaters,reheaters and pipes
for petrochemical industry(with the operating pressure above 9.8Mpa and operating temperature ranging between 450~C~650~C1
Specifications of major steel:
Processing form |
I.D.mm |
Length |
Straightness |
I.D. tolerance |
I.D. Roughness(RA) |
Cold-rolled |
30-100 |
≤12M |
0.3-1.0/1000 |
H8-H10 |
0.4-1.6um |
Cold-drawn |
30-250 |
≤12M |
H8-H10 |
0.8-1.6um |
Hone |
40-500 |
≤12M |
H8-H9 |
0.4-0.8um |
SRB |
50-250 |
≤9M |
H8 |
0.1-0.4um |
Delivery condition:BKS
Tube shall have a smooth internal and external surface consistent with cold working process, tube inner surface should be free from rust, scratches and other surface
irregularities.