IS0 49:1994 pdf download – Malleable cast iron fittings threaded to IS0 7-1.
1 Scope This International Standard specifies requirements for the design and performance of malleable cast iron threaded pipe fittings These fittings are for general purposes for the transmission of fluids and gases up to the limits of pressure and temperature specified in this International Standard. They are intended for the connection of elements threaded in accordance with I S0 7-1, sizes 1/8 to 6. For use in conditions outside the pressure and temperature limits specified, consult the fitting manufacturer. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. I S 0 7-1 :I 994, Pipe threads where pressure-tight joints are made on the threads – Part?: Dimensions, tolerances and designation. I S0 228-1 : 1994, Pipe threads where pressure-tight joints are not made on the threads – Part 7: Dimensions, tolerances and designation. I S 0 28540:-l), Sampling procedures for inspection by attributes – Part O: Introduction to the IS0 2859 attribute sampling system. I S 0 2859-1 : 1989, Sampling procedures for inspection by attributes – Part 7: Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection. I S0 28592:1985, Sampling procedures for inspection by attributes – Part 2: Sampling plans indexed by limiting quality (LO) for isolated lot inspection. I S0 2859-3: 1991, Sampling procedures for inspection by attributes – Part 3: Skip-lot sampling procedures. I S0 5922:1981, Malleable cast iron. I S0 6708:-*), Pipe components – Definition of nominal size (DN)
3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 fitting: Connecting piece, of one or more parts. 3.2 jointing thread: Thread complying with I S0 7-1. 3.3 fastening thread: Thread complying with I S0 228-1. 3.4 fitting size; designation of thread size: Size designation of the threads of the threaded outlets as derived from I S0 7-1 (see also clause 1 3). 3.5 nominal size; DN: For definition see I S0 6708. NOTES 1 Nominal size IS designated by the letters DN followed by the appropriate number. 2 The relationship between fitting size and nominal size (DN) is given in clause 1 5 for guidance only. 3 Nominal size (DN) should not be used for the designation of fitting size. 3.6 reinforcement: Additional material on the outside diameter of an internally threaded fitting in the form of a band or bead (see figure 1).