A335 Alloy Steel Seamless Pipes
A335 alloy steel pipe refers to a specific type of seamless steel pipe that meets ASTM A335/A335M specifications. These pipes are commonly used in various industries that encounter high temperature and high pressure conditions.
ASTM A335 pipe is a seamless ferritic alloy steel pipe used in high temperature environments. The chemical composition of this steel pipe includes molybdenum (Mo) and chromium (Cr), so it is sometimes called chromium-molybdenum pipe. The presence of these elements gives the steel pipe excellent high temperature performance and corrosion resistance.
Steel pipe under ASTM A335 standard specification shall be suitable for bending, flanging (vanstoning) and other forming operations as well as fusion welding. This kind of steel pipe is sometimes called "P grade", of which P11, P22 and P91 grades are the most common and are mainly used in the power industry and petrochemical industry. P5 and P9 grades are commonly used in refineries. ASTM A335 alloy steel pipe is available in three different grades (P1, P2 and P11). Each grade offers unique benefits and is well suited for certain environments and applications. For example, Level 1 is most suitable for low-temperature services, and Level 2 is suitable for high-temperature services. Grade 11 is most commonly used in applications requiring corrosion resistance or high temperatures up to 500°F (260°C).
Overall, A335 alloy steel pipe is a high temperature and high pressure material suitable for a wide range of industries and applications. Commonly used in structural components such as process pipes and heat exchangers in industrial facilities such as power plants, refineries, and petrochemical plants.
Chemical Requirements of Alloy Steel Seamless Pipes
|
Grade |
P-5 |
P-9 |
P-11 |
P-22 |
P-91 |
P-91 shall also include the following: |
|
|
Element |
UNS Designation |
K41545 |
S50400 |
K11597 |
K21590 |
K91560 |
|
|
Carbon |
0.15 max |
0.15 max |
0.05 - 0.15 |
0.05 - 0.15 |
0.08 - 0.12 |
V at 0.18 - 0.25 |
|
|
Manganese |
0.30 - 0.60 |
0.30 - 0.60 |
0.30 - 0.60 |
0.30 - 0.60 |
0.30 - 0.60 |
N at 0.030 - 0.070 |
|
|
Phosphorous, max |
0.025 |
0.025 |
0.025 |
0.025 |
0.020 |
Ni at 0.40 max |
|
|
Sulfur, max |
0.025 |
0.025 |
0.025 |
0.025 |
0.010 |
Al at 0.02 max |
|
|
Silicon |
0.50 max |
0.25 - 1.00 |
0.50 - 1.00 |
0.50 max |
0.20 -0.50 |
Cb at 0.06 - 0.10 |
|
|
Chromium |
4.00 - 6.00 |
8.00 - 10.00 |
1.00 - 1.50 |
1.90 - 2.60 |
8.00 - 9.50 |
Ti at 0.01 max |
|
|
Molybdenum |
0.45 -0.65 |
0.90 - 1.10 |
0.44 - 0.65 |
0.87 - 1.13 |
0.85 - 1.05 |
Zr at 0.01 max |
|
Tensile Requirements of Alloy Seamless Pipes
|
Seamless |
||||||
|
P-5 |
P-9 |
P-11 |
P-22 |
P-91 |
P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC]. |
|
|
Tensile Strength, min., psi |
||||||
|
ksi |
60 |
60 |
60 |
60 |
85 |
|
|
MPa |
415 |
415 |
415 |
415 |
585 |
|
|
Yield Strength, min., psi |
||||||
|
ksi |
30 |
30 |
30 |
30 |
60 |
|
|
MPa |
205 |
205 |
205 |
205 |
415 |
|
ASTM A335 Alloy Steel Seamless Pipe
Packaging and Shipping of ASTM A335 Alloy Steel Seamless Pipe:
ASTM A335 grade alloy steel pipe needs to be packaged in a specific manner to prevent damage during handling and transportation. These steel pipes need to be packed individually into plastic bags, each steel pipe needs to be wrapped with waterproof material, and then tied with nylon rope. This packaging method can effectively prevent the steel pipe from collision or friction during transportation, thereby avoiding possible damage.
The outside of the packaging needs to be clearly labeled, and the label should contain the product quantity and product ID for easy identification and management. This kind of label can effectively prevent confusion during operation and can also help consumers or users quickly determine the product they need.
Gnee Packaging And Shipping
FAQ
Q. How long is your delivery time?
A. Different products have different delivery time. The products will be delivered as soon as possible on the basis of the quality assurance.
Q. How do you guarantee your quality?
A. We have 6 ex-factory inspection procedures. For each batch of products, 25 people participate in the quality inspection during the whole process of material, size, surface treatment, packaging, etc. Ensure that the factory products are 100% qualified.
Q. Do you provide custom made Products service?
A. Yes, if you have your own design, we can produce according to your specification and drawing.
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