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[China]
Trade Verify
Address: Suite 1004, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
Contact name:Richard SHEN
TORICH INTERNATIONAL LIMITED |
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Verified Suppliers
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Seamless Steel Tubes and Pipes for High Pressure Boiler GB 5310
Spec:
Material:20G 20MnG 25MnG
Size Range:OD:4-1200mm
WT:0.3-200mm
General Length:4-12.5m
Tolerance:
According to the following tables or customers’ request.
| Producing method | Size | Tolerance | |||
| General | High grade | ||||
Hot rolling (extrude) | D | <54 | ±0.40 | ±0.30 | |
| >54~325 | S≤35 | ±0.75% | ±0.5% | ||
| S>35 | ±1% | ±0.75% | |||
| >325 | ±1% | ±0.75% | |||
| S | ≤4.0 | ±0.45 | ±0.35 | ||
| >4.0~20 | ±12.5%-10% | ±10% | |||
| >20 | D<219 | ±10% | ±7.5% | ||
| D≥219 | ±12.5%-10% | ±10% | |||
| Hot expand | D |
complete
| ±1% | ±0.75% | |
| S | +20%-10% | +15%-10% | |||
| Cold drawn(rolling) | D | ≤25.4 | ±0.15 | _ | |
| >25.4~40 | ±0.20 | _ | |||
| >40~50 | ±0.25 | _ | |||
| >50~60 | ±0.30 | _ | |||
| >60 | ±0.5% | _ | |||
| S | ≤3.0 | ±0.3 | ±0.2 | ||
| >3.0 | ±10% | ±7.5% | |||
Characteristic:
High Creep Rupture Strength
High antioxidant properties
Good organizational stability
Good concentricity
Good OD and ID tolerance
High Precision
Stable quality
Smooth Roughness
TORICH QUALITY ASSURANCE
Processing:
RAW MATERIAL
↓
INCOMING INSPECTION
↓
STORAGE → CUTTING→HAMMERING → PICKING LUBRICATION → CLEANING → PHOSPHORI CLEAN
↓
ENDS CUTTING←STRAIGHTENING←HEAT TREATMENT↔MIDDLLE CHECK↔ COLD DRAWING ← LUBRICATING
↓
FINAL INSPECTION→BUNDING→STORAGE
Technical Delivery Conditions:
The steel tube shall be supplied in the heat treated conditions as per the heat treatment conditions desicrebed the table given below. The heat treatmet conditions shall be indicated in the quality certification.
Widely used in the field of:High pressure boiler
Product Images:
