Standardi implementacije: GB/T8162 bešavne čelične cijevi za konstrukciju, GB/T8163 bešavne čelične cijevi za transport fluida. 0420D i 0420E mehanička svojstva: vlačna čvrstoća 520~680MPa,<16 service strength 2420MPa, 16mm~30mm service strength 2400, 230mm Yield strength 2380MPa Impact test Q420D minus 20C Impact energy 234, impact test Q420E minus 40C Impact energy 227 :0.20, chromium: <0.30, nickel: <0.50, copper: 0.20, nitrogen: 0.015, :0.20, aluminum, 20.015.Q420E seamless steel pipe chemical composition: carbon: 0.20, silicon: 0.50, :1.70, phosphorus: 0.025, Sulfur: 0.020, : 0.07, : 0.20, : 0.20 Chromium: <0.30, Nickel: <0.50, Copper: <0.20, Nitrogen: 0.015, : 0.20, Aluminum, 20.015. Steel refining method: Steel should be processed by electric arc furnace Refining outside the furnace or gas converter plus outside refining method. After negotiation between the supply and demand parties, other methods with higher requirements can also be used to treat refining. When the demander requires a certain refining method, it should be stated in the contract.
Način proizvodnje cijevi: Cijevi se također mogu proizvoditi kontinuiranim lijevanjem, livenjem u kalupe ili vrućim valjanjem.
Kontinuirano livene cevi takođe treba da budu u skladu sa propisima YB/T 4149; vruće cijevi također treba da budu u skladu sa propisima YB/T 5221 ili YB/T 5222; livene cevi se takođe mogu odnositi na propise o vrućim (kovanim) cevima.
