GOST-8733-GOST-8734

GOST 8733-74 COLD-FINISHED GENERAL-PURPOSE STEEL TUBESGOST 8734-75 COLD-FINISHED GENERAL-PURPOSE STEEL TUBESTubes to these standards are delivered with diameters 5 to 250 mm and wall thickness 0.3 to 24 mm.Size range and dimensional tolerances for tubes are given in Table 1.Depending to D/t ratio,tubes to these standards shall be extra thin wall (D/t>40),thin wall (D/t-12.5 to 40).thick wall (D/t-6 to 12.5).extra heavy wall (D/t 6).Limit wall thickness tolerances are given below.Tommma cremxot (Nall thickness)OrxmoHeHmeTolerance:no1s(udeE1】h0,12m07105N(1t05a]t1011o7102,5pDs11086anee1t02.5=for 00 aver 110 mm)±12.54cssme 5 et (over 5 mm)士8号Tubes shall be delivered in random (1.5 to 11.5 m)specified (4.5 to 9 m)and multiple (1.to 9 m)lengths.For randam length no toleranoe is specified:for specified length,tolerance shall be +10 mm;for specified length,5 mm allowance per cut.A lot of tubes of multiple length shall have not more than 5%of tubes of random length not shorter than 2.5 meters.