A691 91CR Alloy Steel EFW Pipes
A691 91CR alloy steel EFW pipe is typically used in temperatures ranging from 482°C (900°F) to 649°C (1200°F) and can even withstand higher temperatures in some cases. This temperature range is determined based on the creep strength, oxidation resistance, and corrosion resistance of the material.
A691 91CR welded pipe offers wider durometer, higher composite block and expanded strength. These welded pipes are available in various sizes from 1/8" NB to 36" NB, 1/4" OD to 36" OD sizes.
A691 91CR alloy steel pipe has excellent high temperature and corrosion resistance properties. It is widely used in the oil and gas industry, chemical industry, and power industry. In these fields, it is used to manufacture key equipment such as boilers, superheaters, reheaters, and transmission pipelines to ensure the safe operation of equipment in high temperature and corrosive environments.
Chemical Composition of A691 91 Alloy Steel EFW Pipes
| 91 | |
| C | 0.08-0.12 |
| Mn | 0.30-0.60 |
| P | 0.020 |
| S | 0.010 |
| Si | 0.20-0.50 |
| Cr | 8.00-9.50 |
| Mo | 0.85-1.05 |
| V | 0.18-0.25 |
Tensile Requirements of A691 91 EFW Pipe
| Grade | Tensile (MPa) | Yield (MPa) | Elong. (50mm) | Reduc'n of Area* |
|---|---|---|---|---|
| 91 | 415 - 585 | 205 min | 18% min | 40% min |
A691 Grade 91 Alloy Steel EFW Pipes
End Bevelling
Cutting to requested Lengths
Grinding or Shot-Blasting of External Tube Surfaces
Outside surface painting using environment-friendly paints
Ultrasonic Testing
Impact Resistance Testing at +20°C to-60°C
Hydrostatic Testing at Pressure of up to 130 MPa depending on customer requirements
Why choose us
gnee has 14 steel production lines, 10 processing equipment for processing, bending, painting, heat treatment, cutting, drilling, beveling, tempering, surface treatment, complete testing equipment and strong technical force. The annual production capacity is more than 60,000 tons.
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FAQ
1.Q.What's your advantage?
A.Honest business with competitive price and professional service on export process.
2.Q.Can your products be customized?
A.Yes, we can produce and process according to your requirements.
3.Q. Do you have a quality control system?
A.Yes, we have our own quality control laboratory.
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