Gb/t3087 4 - 12.5m Length Seamless Steel Tube For Low / Medium Pressure Boiler
| Standard | GB/T3087 |
| Material | 10#, 20# |
| Size | OD: 6-127mm WT: 0.5-12 Length: 4-12.5m |
| Techinique | Hot Rolled and Cold Drawn |
| Delivery Condition | Hot Rolled or Normalizing |
| Test | Flare Test, Bend Test, Hydraulic Test, Macroscopic Test, Nondestructive Test etc |
| Application | Low and Medium Pressure Boiler |
Tensile Requirements
| Grade | Tensile Strength, MPa | Yeild Strength, MPa min | Elongation, % min |
| Wall Thickness, mm ≤16 >16 | |||
| 10 | 335-475 | 205 195 | 24 |
| 20 | 410-550 | 245 235 | 20 |
Outside Diameter Requirements
| Type | Permissible Variation |
| Hot Rolled (Hot Extrusion/Expand) | ±1.0%D or ±0.50, choose lager one |
| Cold Drawn (Rolled) | ±1.0%D or ±0.50, choose lager one |
Wall Thickness Requirements
| Type | OD | S/D | Permissible Variation |
| Hot Rolled (Hot Extrusion) Tube | ≤102 | - | ±12.5%S or ±0.40, choose lager one |
| >102 | ≤0.05 | ±15%S or ±0.40, choose lager one | |
| >0.05-0.10 | ±12.5%S or ±0.40, choose lager one | ||
| >0.10 | ±12.5%S, -10%S | ||
| Hot Expanded Tube | ±15%S | ||
| Type | Wall Thickness | Permissible Variation |
| Cold Drawn (Rolled) | ≤3 | +15% -10%S or ±0.15, choose lager one |
| >3 | ±12.5%S, -10%S |
Straightness
| Norminal Wall Thickness/mm | Bending per Meter |
| ≤15 | ≤1.5 |
| >15-30 | ≤2.0 |
| >30 or OD≥351 | ≤3.0 |
Product Show
QUALITY CONTROL:
1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing and Cold Rolling, on line inspection
5. Heat Treatment, +A, +SRA, +LC, +N, Q+T
6. Straightening-Cutting to specified length-Finished Measuring Inspection
7. Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8. Packing and Stocking
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.
Q: Are you trading company or manufacturer ?
A: A professional steel pipes materials inventor, manufacturer and solution provider
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 30-60 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples of carbon seamless steel tube ? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us
TORICH GB/T3087 Seamless Steel Tube for Low and Medium Pressure Boiler
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