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1.forming methods: pressing, spinning.
2.specification(about size and wall thickness): according to client's requirements.
3.our company can provide drawings in accordance with processing.
4.head's gradient as follows:
DN | straight edge | gradient | tolerance of total depth(height) |
DN≤2000mm | h=25 | outer:1.5inner:1.0 | (-0.2~+0.6)%DN |
DN≥2000mm | h=40 | outer:2.5 inner:1.5 | (-0.2~+0.6)%DN |
others |
| outer:6%h &≤5 inner:4%h &≤3 | (-0.2~+0.6)%DN |
5.tolerance of groove angle and groove dimension, groove surface roughness as follows:
items | tolerance |
groove angle | ±2.5° |
groove dimension | ±1mm |
groove surface roughness | ≤25, no cracks ,delamination, inclusions and other defects |