NEW-ERA STEEL TUBE HOLDING
NINGBO PIPEWAY TRADE CO.,LTD
| Place of Origin: | China |
|---|---|
| Brand Name: | New Era |
| Certification: | ISO9001 ISO14001 |
| Model Number: | GB/T9808 |
| Minimum Order Quantity: | 5tons |
| Price: | Negotiation |
| Packaging Details: | Bundles Package, Wooden Box Package |
| Delivery Time: | 45 days |
| Payment Terms: | T/T |
| Supply Ability: | 3000 tons/month |
| Keyword: | Seamless Steel Tubes | Shape: | Round |
|---|---|---|---|
| OD Size: | 30-340mm | WT Size: | 2-30mm |
| Steel Material: | 30CrMo ZT380 | Usage: | Oil Pipe |
| Surface: | Oiled | Delivery Time: | 45 Days |
| Highlight: | cold drawn seamless steel tube,thick wall steel tube |
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GB/T9808 ZT380 Good OD and ID tolerance Seamless Steel Tubes
Size:
OD:33-340mm WT:2-28mm L:4000mm-12500mm
Steel Grade:
ZT380,ZT490,ZT520,ZT540,ZT590,ZT640,ZT740
The Production method:
Hot rolling(extrusion) or cold drawing(rolling) seamless method.
Delivery State:
Hot rolling(extrusion)steel tubes should be delivered with hot rolling condition or hot finished.Cold drawn(rolling) steel tubes should be delivered with hot finished.
Surface quality
There is no visual visible cracks,rolling, folding,scarring and abscission layer in the internal and external surfaces of the steel pipe.
Test:
Tensile tast
Ultrasonic inspection
Eddy current inspection
Magnetic flux leakage inspection
Tolerance of Outer Diameter and Wall Thickness
| Standard | Production Method | Tube Size | Tolerance | |
| GB/T 9808-2008 | Hot rolled | OD | (+1.0%D) or +0.65 (-0.5%D) -0.35 |
|
| WT | ≤10 | (+15%S)or +0.45 (-10%S) -0.35 |
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| >10 | (+12.5%S, -10%S) | |||
| Cold Drawn(rolled) | OD | ±0.50%D or ±0.20 | ||
| WT | ±8%S or ±0.15 | |||
| Q(N)/ T118-2010 | Cold Drawn | OD | OD | ±0.40%D or ±0.20 |
| WT | WT |
±7%S or ±0.15 |
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