ISO 49:1994 pdf download.Malleable cast iron fittings threaded to ISO 7-1
1 Scope
ISO 49:1994 pdf download specities 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 ISO 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 subiect 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 ISO maintain registers of currently valid International Standards.
ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads — Parr 1: Dimensions, tolerances and designation.
ISO 228-1:1994, Pipe threads where pressure-right joints are not made on the threads — Part 1: Dimensions, tolerances and designation.
ISO 2859-O:—’, Sampling procedures for inspection by attributes — Part 0: Introduction to the iSO 2859 attribute sampling system.
ISO 2859-1:1989, Sampling procedures for inspection by attributes — Part 1: Sampling plans indexed by acceptable quality level (AOL) for lot-by-lot inspection.
ISO 2859-2:1985. Sampling procedures for inspection by attributes — Parr 2: Sampling plans indexed by limiting quality (LQ) for isolated lot inspection.
iSO 2859-3:1991, Sampling procedures for inspection by attributes — Part 3: Skip-lot sampling procedures. ISO 5922:1981, Malleable cast iron.
ISO 6708:__2). Pipe components — Definition of nominal size (ON).
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 ISO 7-1.
3.3 fastening thread; Thread complying with ISO 228-1.
3.4 fitting size; designation of thread size: Size designation of the threads of the threaded outlets as derived from ISO 7-1 (see also clause 13).
3.5 nominal size; DN: For definition see ISO 6708.
NOTES
1 Nominal size is designated by the letters DN followed by the appropriate number.
2 The relationship between ftting size and nominal size (DN) is given in clause 15 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).ISO 49 pdf download.