Safonau gweithredu: pibell ddur di-dor GB/T8162 ar gyfer strwythur, pibell ddur di-dor GB/T8163 ar gyfer cludo hylif. Priodweddau mecanyddol 0420D a 0420E: cryfder tynnol 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.
Dull gweithgynhyrchu pibellau: Gellir cynhyrchu pibellau hefyd trwy gastio parhaus, castio llwydni neu rolio poeth.
Dylai pibellau cast parhaus hefyd gydymffurfio â rheoliadau YB/T 4149; dylai pibellau poeth hefyd gydymffurfio â rheoliadau YB/T 5221 neu YB/T 5222; gall pibellau cast llwydni hefyd gyfeirio at reoliadau pibellau poeth (ffugio).
