CJ/T 245-2007 Syphonic roof outlet

CJ/T 245-2021 The general technical specifications for rainwater outlets used for roof drainage

GB/T 12771-2019 Welded stainless steel pipes for fluid transport GB/T 12772-1999 Cast iron pipes and fittings with flexible joint sewerage GB/T 12772-2008 Cast iron pipes、fittings and accessories with flexible joint sewerage for drainage GB/T 12772-2016 Cast iron pipes,fittings and accessories with flexible joint sewerage for drainage GB/T 13663-2000 Polyethylene pipes for water supply GB/T 13663.1-2017 Polyethylene(PE)piping systems for water supply—Part 1:General GB/T 13663.2-2005 Polyethylene(PE)pipings systems for water supply—Part 2:Fittings GB/T 13663.2-2018 Polyethylene(PE)piping systems for water supply—Part 2:Pipes GB/T 13663.3-2018 Polyethylene(PE)piping systems for water supply—Part 3:Fittings GB/T 13663.5-2018 Polyethylene (PE) piping systems for water supply—Part 5:Fitness for purpose of the system GB/T 13819-1992 Copper alloy castings GB/T 13819-2013 Copper and copper alloy castings GB/T 14976-2002 Stainless steel seamless tubes for fluid transport GB/T 14976-2012 Seamless stainless steel pipes for fluid transport GB/T 14976-2025 Seamless stainless steel pipes for fluid transport HG/T 3091-2000 CJ/T 177-2002 Work coupling type cast iron pipe and fittings for building drainage HB 5220.1-1982 General principles for chemical analysis of high-temperature alloys HB 5220.1-2008 Methods for chemical analysis of superalloys-Part 1:Determination of carbon content by coulometric method HB 5220.2-1982 Determination of carbon content in high temperature alloys HB 5220.2-2008 Methods for chemical analysis of superalloys-Part 2:Determination of carbon content by gasometric method HB 5220.3-1982 The determination of sulfur content in high-temperature alloys HB 5220.3-2008 Methods for chemical analysis of superalloys-Part 3:Determination of carbon content by high frequency induction combustion-infrared absorption method HB 5220.4-1982 The determination of phosphorus content in high-temperature alloys HB 5220.4-2008 Methods for chemical analysis of superalloys-Part 4:Determination of sulfur content by reducing distillation photometric method HB 5220.5-1982 The determination of silicon content in high-temperature alloys HB 5220.5-2008 Methods for chemical analysis of superalloys-Part 5:Determination of sulfur content by potassium iodate volumetric method HB 5220.6-1982 The determination of manganese content in high-temperature alloys HB 5220.6-2008 Methods for chemical analysis of superalloys-Part 6:Determination of sulfur content by high frequency induction combustion-infrared absorption method HB 5220.7-1982 The determination of chromium content in high-temperature alloys HB 5220.7-2008 Methods for chemical analysis of superalloys-Part 7:Determination of phosphorus content by ethyl ether extraction molybdenum blue photometric method HB 5220.8-1982 Determination of vanadium content in high temperature alloys HB 5220.8-2008 Methods for chemical analysis of superalloys-Part 8:Determination of phosphorus content by n-butyl alcohol-chloroform extraction photometric method HB 5220.9-1982 The determination of titanium content in high-temperature alloys HB 5220.9-2008 Methods for chemical analysis of superalloys-Part 9:Determination of silicon content by gravimetric method HB 5220.10-1982 Determination of Al content in High Temperature Alloys HB 5220.10-2008 Methods for chemical analysis of superalloys-Part 10:Determination of silicon content by silicon molybdenum blue photometric method HB 5220.11-1982 Determination of copper content in high-temperature alloys HB 5220.11-2008 Methods for chemical analysis of superalloys-Part 11:Determination of manganese content by ammonium nitrate oxidation-ammonium ferrous sulfate volumetric method HB 5220.12-1982 The determination of nickel content in high-temperature alloys HB 5220.12-2008 Methods for chemical analysis of superalloys-Part 12:Determination of manganese content by zion oxide separation--ammonium ferrous volumetric method HB 5220.13-1982 The determination of cobalt content in high-temperature alloys HB 5220.13-2008 Methods for chemical analysis of superalloys-Part 13:Determination of manganese content by potassium periodate photometric method HB 5220.14-1982 Determination of copper content in high temperature alloys HB 5220.15-1982 The determination of iron content in high-temperature alloys HB 5220.15-2008 Methods for chemical analysis of superalloys-Part 15:Determination of chromium content by ammonium persulfate oxidation-ammonium iron (Ⅱ) volumetric method HB 5220.16-1982 The determination of tungsten content in high-temperature alloys HB 5220.16-2008 Methods for chemical analysis of superalloys-Part 16:Determination of vanadium content by ammonium ferrous sulfate volumetric method HB 5220.17-1982 The determination of niobium content in high-temperature alloys HB 5220.17-2008 Methods for chemical analysis of superalloys-Part 17:Determination of vanadium content by N-benzyl-N-phenylhydroxylamine-chloroform extraction photometric method HB 5220.18-1982 The determination of tantalum content in high temperature alloys HB 5220.18-2008 Methods for chemical analysis of superalloys-Part 18:Determination of titanium content by diantipyrylmethane photometric method HB 5220.19-1982 Determination of Zirconium Content in High-temperature Alloys HB 5220.19-2008 Methods for chemical analysis of superalloys-Part 19:Determination of aluminum content by cupferron,cupron separation-EDTA volumetric method HB 5220.20-1982 Determination of cerium content in high temperature alloys HB 5220.20-2008 Methods for chemical analysis of superalloys-Part 20:Determination of aluminium content by chrome azurol S photometric method HB 5220.21-1982 Determination of total amount of rare earth (cerium) in high-temperature alloys HB 5220.21-2008 Methods for chemical analysis of superalloys-Part 21:Determination of molybdenum content by EDTA volumetric method HB 5220.22-1982 Determination of Boron Content in High-temperature Alloys HB 5220.22-2008 Methods for chemical analysis of superalloys-Part 22:Determination of molybdenum content by thiocyanate photometric method HB 5220.23-1982 Determination of nitrogen content in high-temperature alloys HB 5220.23-2008 Methods for chemical analysis of superalloys-Part 23:Determination of nickel content by dimethyglyoxime-EDTA volumetric method HB 5220.24-2008 Methods for chemical analysis of superalloys-Part 24:Determination of nickel content by dimethyglyoxime photometric method HB 5220.25-2008 Methods for chemical analysis of superalloys-Part 25:Determination of cobalt content by potassium ferricyanide potentiometric titration method HB 5220.26-2008 Methods for chemical analysis of superalloys-Part 26:Determination of cobalt content by nitroso-R-salt photometric method HB 5220.27-2008 Methods for chemical analysis of superalloys-Part 27:Determination of copper content by cupral-ethyle ether extraction photometric method HB 5220.29-2008 Methods for chemical analysis of superalloys-Part 29:Determination of iron content by potassium dichromate volumetric method HB 5220.30-2008 Methods for chemical analysis of superalloys-Part 30:Determination of iron content by phenanthroline photometric method HB 5220.31-2008 Methods for chemical analysis of superalloys-Part 31:Determination of tungsten content by cinchonine-ethylnaphthalene quinoline gravimetric method HB 5220.32-2008 Methods for chemical analysis of superalloys-Part 32:Determination of tungsten content by thiocyanate photometric method HB 5220.33-2008 Methods for chemical analysis of superalloys-Part 33:Determination of niobium content by tetraphenyl arsonium chloride hydrochloride gravimetric method HB 5220.34-2008 Methods for chemical analysis of superalloys-Part 34:Determination of niobium content by sulphochlorophenol C photometric method HB 5220.35-2008 Methods for chemical analysis of superalloys-Part 35:Determination of tantalum content by pyrogallic acid photometric method HB 5220.36-2008 Methods for chemical analysis of superalloys-Part 36:Determination of zirconium content by arsenazo Ⅲ photometric method HB 5220.37-2008 Methods for chemical analysis of superalloys-Part 37:Determination of zirconium content by N-benzoyl-N-phenylhydroxylamine-benzene extraction-arsenazo Ⅲ photometric method HB 5220.38-2008 Methods for chemical analysis of superalloys-Part 38:Determination of cerium content by extraction separation-arsenazo Ⅲ photometric method HB 5220.39-2008 Methods for chemical analysis of superalloys-Part 39:Determination of total rare earth content by PMBP direct extraction-arsenazo Ⅲ photometric method HB 5220.40-2008 Methods for chemical analysis of superalloys-Part 40:Determination of boron content by methanol distillation-curcumin photometric method HB 5220.41-2008 Methods for chemical analysis of superalloys-Part 41:Determination of boron content by fluoroborate ion selective electrode method HB 5220.42-2008 Methods for chemical analysis of superalloys-Part 42:Determination of cerium content by DBC-arsenazo photometric method HB 5220.43-2008 Methods for chemical analysis of superalloys-Part 43:Determination of lanthanum content by DBC-arsenazo photometric method HB 5220.44-2008 Methods for chemical analysis of superalloys-Part 44:Determination of arsenic content by distillation separation-molybdenum blue photometric method HB 5220.45-2008 Methods for chemical analysis of superalloys-Part 45:Determination of antimony content by carrier precipitation molybdenum blue phtotmetric method HB 5220.46-2008 Methods for chemical analysis of superalloys-Part 46:Determination of bismuth content by semixylenol orange photometric method HB 5220.47-2008 Methods for chemical analysis of superalloys-Part 47:Determination of lead content by carrier precipitation-xylenol orange photometric method HB 5220.48-2008 Methods for chemical analysis of superalloys-Part 48:Determination of nitrogen content by water vapour distillation-volumetric method(or photometric method) HB 5220.49-2008 Methods for chemical analysis of superalloys-Part 49:Determination of oxygen,nitrogen content by impulse heating-infrared,thermal conductivity method HB 5220.50-2008 Methods for chemical analysis of superalloys-Part 50:Determination of hydrogen content by impulse heating-thermal conductivity method HB 6731.1-1993 The determination of copper content in aluminum alloy by atomic absorption spectrometry HB 6731.2-1993 The determination of magnesium content in aluminum alloy by atomic absorption spectrophotometry HB 6731.3-1993 Aluminum alloy atomic absorption spectroscopy analysis method for determination of zinc content HB 6731.4-1993 The determination of lead content in aluminum alloy by atomic absorption spectrophotometry HB 6731.5-1993 HB 6731.6-1993 Aluminum alloy atomic absorption spectrophotometry for the determination of iron content HB 6731.7-1993 Determination of manganese content in aluminum alloy by atomic absorption spectrometry HB 6731.8-1993 The determination of nickel content in aluminum alloy by atomic absorption spectrophotometry HB 6731.9-1993 The determination of chromium content in aluminum alloy by atomic absorption spectrometry HB 6731.10-1993 Determination of vanadium content in aluminum alloy by atomic absorption spectrometry