ASTM A691 alloy steel seamless pipe is a seamless steel pipe produced in accordance with ASTM A691 standards and is mainly used in high temperature and high pressure applications. This steel pipe is made of alloy steel and has excellent high temperature resistance, corrosion resistance and mechanical strength.
The ASTM A691 standard specifies requirements for the manufacture, testing and inspection of alloy steel seamless pipe to ensure its quality and performance. According to different alloy compositions and manufacturing processes, ASTM A691 alloy steel seamless pipes can be divided into different grades and types to adapt to different working environments and requirements.
This kind of seamless pipe is usually used in high temperature, high pressure and corrosive environments in the petroleum, chemical, electric power and nuclear industries. For example, in oil and gas extraction, ASTM A691 alloy steel seamless pipes can be used in the manufacture of oil well casing, transmission pipelines and refining equipment. In the chemical industry, they are used to manufacture reactors, heat exchangers and piping systems, etc.
It should be noted that ASTM A691 alloy steel seamless pipe should be properly heat treated and inspected before use to ensure that it meets specific performance requirements. In addition, during use, regular maintenance and inspections should be carried out to ensure its safety and reliability.
Overall, ASTM A691 alloy steel seamless pipe is a high-quality, high-performance seamless steel pipe suitable for demanding high temperature, high pressure and corrosive applications.
A691 Material Specification
| Grade | Alloy Steel ASTM A691 Cl22, A691 GRADE 1 CR, GRADE 1/2 CR, GRADE 1 1/4 CR, GRADE 2 1/4 CR, GRADE 3 CR, GRADE 5 CR, GRADE 9 CR, GRADE 91, CM 65, CM 70, CM 75 |
| Size | 1/2" NB to 36" NB |
| Thickness | 3-12mm |
| Schedules | SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Class Designation | Class 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 34, 40, 41, 42, 43, 50, 51, 52, 53, 60, 61, 62, 63, 70, 71, 72, 73 |
| ASTM A691 Grades |
ASTM A691 Gr 11, ASTM A691 Gr.91, ASTM A691 9cr, ASTM A691 5cr, ASTM A691 1 1/4cr Cl22, ASTM A691m, |
| Tolerance | Cold drawn pipe: +/-0.1mm
Cold rolled pipe: +/-0.05mm |
| Craft | Cold rolled and Cold drawn |
| Type | Seamless / ERW / Welded / Fabricated / LSAW Pipes |
| available in Form of | Round, Square, Rectangular, Hydraulic Etc. |
| Length | Standard Double & In Cut length also. |
| End | Plain End, Beveled End, Treaded |
| Specialized in | Large Diameter ASTM A691 Pipe |
