DIN-2440-Medium-weight-threaded-steel-tubes

Hebei Haihao GroupUDC621.643.2-034.14:621.882.082.22HHJune 1978Medium-weight threaded steel tubes丽2440Stahlrohre;mittelschwere GewinderohreAs it is current practice in standards published by the Interational Organization for Standardization (ISO),the commahas been used throughout as a decimal marker.As regards the nominal sizes and tube dimensions quoted,this standard corresponds to /S0 65-1973 published bythe Internationaf Organization for Standardization (ISO),see Explanatory notes.1 Field of applicationDimensians in mmThis standard applies to threaded medium-weight tubes.They are suitable for nominai pressure 25 for liquids andnominal pressure 10 for air and non-hazardous gases.2 Other standards to be observedDIN 2444Zinc coatings on steel tubes;quality standard for the hot gaivanizing of steel tubes for installationpurposesDIN 2999 Part 1Whitworth pipe threads for tubes and fittings;cylindrical internal thread and conical externalthread;thread dimensionsD1N17100Steels for general structural purposes;quality specificationsD1N50136Testing of metallic materials;flattening test on tubes3 Dimensions,designationStandard designPipe design with taper thread(for tube ordered with pipe thread)Designation of a seamless medium-weight threaded tube,nominal size 40,galvanized(B),in manufacturing lengths:Threaded tube DIN 2440-DN 40-seamless BTable 1.ConneetTubePipe threadCormaspondingWhit-socket conform-IngnominalworthMassDistance afTheo-NumberUsafulpipeing to DIN 2986Nompipe threadaze ot thepipefetc思CutsideWallofofhrea时diameterOutsidethickplain endpipethresdsengthsocketedsizeconformas indiam-threaddiam-Lengthing toDINeternesstubetube254mmmin.from tube enddiameterecerD1N2960and2999aDNp1N2980Part 1kg/mkg/mmax.rmBX。min.min.min.6R810,22004070.4109.72828744.93.1141713.52350.6B00含51315了1911.0734718.52510R381722350.8520.85B16.6621911A7751213■261522132651,221.2320.9551415010.06.428.4342034R3426.92651.5B15926.4411416.311.37731.8362533,73,252,44246■33.2491119.1127395■423221在4243253.143.1741,91011214↑5.010.448.34840112124833253.613.6547.803112141写010454.5AR日26033.855.105.17596141125.718,21366635622A2276,13.656,5166375.184130221.014.0■A65BD38B914.058,478.6487,8433324.171■957110011434.51.12411303011393219183125139.74.8616.216.7130.430114321L25,11479215016I R 6165,14.8619.2198163301143632,125.1174921)Related to an average length of 5m.A decision with regard to the method of designation for fittings will be taken at the time when the currently existingISO Recommendations are converted to ISO Standards,due consideration being given to international practice regard-ing the designation of threaded tubes.Continued on pages 2 and 3Explanatory notes on page 4Email:sales@haihaogroup.comwww.haihaopiping.com