special head
1)Material: verious material are available
2)Standard: ISO9001-2008,GB/T25198-2010
3) welcome OEM service
4)license:A3
91)Material: verious material are available
2)Standard: ISO9001-2008,GB/T25198-2010
3) welcome OEM service
4)license:A3Features
1.DN: 159mm-6000mm
2.Non-destructive: RT UT
3.high quality and competitive price
4.we manufacture grade of A3 heads
5.forming methods: pressing, spinning.
6.specification(about size and wall thickness): according to client's requirements.
7our company can provide drawings in accordance with processing.
8.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
9.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 |