Cones/blanking plate are the specially formed pieces that are welded to the pipe ends for fixing the bolts. Cones shall be of the same quality material with the pipes and shall be formed either by milling or hot forging methods in conformity with GB/T1591-2008 standards and shall be coated with the paint layer.
|
Material |
Code |
Chemical Content |
Physical Performance |
||||||
|
C（%） |
Si（%） |
Mn（%） |
P（%） |
S（%） |
Tensile Strength σs（MPa） |
Yield Strength σb（MPa） |
Elongation δ（%） |
||
|
Q235B |
GB/T699-1999 |
0.12~0.20 |
≤0.30 |
0.30~0.70 |
≤0.045 |
≤0.045 |
375~500 |
≥235 |
≥26 |
