MSS SP 107 : 1991

1 Scope
2 Design
3 Pressure-Temperature Ratings
4 Reference Standards
5 Abbreviations
6 Size
7 Markings
8 Materials
9 Dimensions
10 Threaded Ends
Table 1 Pressure-Temperature Ratings
       2 Union End, PVC and CPVC
       3 Union End, Polypropylene and PVDF
       4 Machined Internal Pipe Threads
       5 Molded Internal Pipe Threads (Thermoplastic)
       6 Machined External Threads
       7 Dimensions
Figure 1 Assembly of all Unions
       2 Plastic Only
       3 Union Designs and Drawings (Illustrative Only)

Covers 1/2 to 2 unions with plastic headpieces that are used for joining metal to plastic piping systems. Includes design, pres sure-temperature ratings, reference standards, size, abbreviations for end connections, material, markings, threaded ends and dimensions.