ASTM A333 Mehanska cev iz ogljikovega jekla

nizkoogljična jeklena cev A333

Glavna področja uporabeJeklena cev ASTM A333vključujejo nafto, kemično industrijo, farmacijo in druga področja. V naftni industriji se brezšivne jeklene cevi ASTM A333 uporabljajo predvsem za proizvodnjo cevovodov za prenos nafte in zemeljskega plina, ki zahtevajo visoko trdnost in dobro odpornost na nizke temperature.
Ali je mogoče nizkotemperaturno jekleno cev A333 Gr6 zamenjati s 16Mn?
In principle, it is not possible, but it can be considered as a substitute within a certain range of applications. There are two main types of low-temperature steel: nickel-containing and nickel-free steel. A333 Gr6 steel pipe is a nickel-free steel and a kind of aluminum-deoxidized fine-grained low-temperature toughness steel. As a low-temperature steel, its composition and structure must ensure sufficient fracture toughness to prevent brittle fracture when used at low temperatures. Experiments have shown that the presence of S, P, O, N, H and other impurities has a very obvious negative impact on the toughness of the weld. Therefore, it is necessary to ensure that the weld contains the least harmful impurities during the welding process. A333.6 low-temperature steel pipe steel has better welding performance and generally does not require preheating. However, when the wall thickness is >=25 or the ambient temperature is lower than +5℃, appropriate preheating measures should be taken to reduce welding crack sensitivity and improve joints. Low temperature toughness. To replace 16Mn steel pipe, please use it with caution. They can be substituted for each other on some cryogenic pipelines, depending on the actual use.

Mehanska cev iz ogljikovega jekla ASTM A333

gnee je specializirano za raziskave in razvoj, proizvodnjo in prodajo brezšivnih jeklenih cevi. Zagotovimo lahko standarde, specifikacije, materiale, uporabo cevi iz ogljikovega jekla, cevi iz legiranega jekla in njihovih predelanih izdelkov, ki jih zahtevajo stranke.

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