Specifications

1.DN: 25mm-12000mm
2.Non-destructive: RT UT
3.material: carbon steel, stainless steel
nnection: welding

 

elliptical head

 

1.forming methods: pressing, spinning, pressure drums.

 

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