Selection of pipe fitting materials
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The flange standard is SH/T 3406, and the material is ASTM A105. Seamless tees are used for the pipes, with the requirement that these seamless tees comply with the standard SH/T 3408. So which material should be chosen in this case? Upon checking SH/T3408, no American standard material grades are listed among the materials to be used. I’m seeking answers from those who have worked on similar projects; thank you!
A105 is a carbon steel forging; the user can choose materials that meet national standards based on parameters such as temperature and pressure, such as 10#, 20#, 16Mn forgings, etc. The prerequisite is to meet relevant requirements such as temperature and pressure.
Thank you for your answer; I thought the same thing. Based on factors such as design pressure, temperature, and the type of medium, materials that meet the relevant national standards should be selected
The A105 range is too broad and it isn’t a specific material, so you can choose one yourself.
If the medium is not highly corrosive and the pressure is relatively low (design pressure below 4.0 Mpa), choose 20# GB/T8163; if higher requirements are placed on the chemical composition of the steel pipe or the pressure is high, then choose 20# GB9948
A105 is a forging standard according to American standards; its material is generally similar to that of 20# forgings used in China. In other words, it is acceptable to use 20# material for pipes (as specified in GB8163, GB3087, and GB9948), but you need to determine the appropriate material based on the temperature and pressure of the medium involved. For example, 20# GB/T8163 is suitable for ordinary media, while 20# GB/T3087 is required for thermal pipelines (steam). For flammable and explosive media under high temperature and pressure, 20# GB/T9948 is generally used
The last edit to this post was made by Xifeng Shouma on 2018-1-2 at 14:21. A105 is a forging standard based on American specifications; its material is generally similar to that of 20# forgings used in China. In other words, it is acceptable to use 20# material (as specified in GB8163, GB3087, and GB9948) for pipes, but you need to determine the appropriate material based on the temperature and pressure of the fluid involved. For example, 20# GB/T8163 is suitable for ordinary media, while 20# GB/T3087 is required for thermal pipelines (steam). For flammable and explosive media under high temperature and pressure, 20# GB/T9948 is generally used ； Of course, if you insist on choosing steel pipe materials that meet American standards, then selecting ASTM A106 Gr B is also an option.