Abstract： ASME B16.18:2012 pdf download.Cast Copper Alloy Solder Joint Pressure Fittings. 8.3 Ovatity Maximum ovality shall not exceed 1% of the maximum diameters shown in Table 3 or Table 1-3. The average of the maximum and minimum diameters must be...

ASME B16.18:2012 pdf download.Cast Copper Alloy Solder Joint Pressure Fittings.

8.3 Ovatity

Maximum ovality shall not exceed 1% of the maximum diameters shown in Table 3 or Table 1-3. The average of the maximum and

minimum diameters must be within the dimensions shown in the table.

8.4 Gaging of Solder Point Ends

8.4.1 Standard Gaging Method. The standard method of gaging the diameter tolerances for male and female cnds shall be by the use of plain plug and ring gages designed to hold the product within the limits established in Table 3 or Table 1-3.

8.4.2 Optional Gaging Method. For gaging the diameter tolerance of male and female ends, the mantifacturer may use direct reading

instniments instead of ring and plug gages as specified in para. 8.4.1. When gaging the diameters of male and female ends using

direct reading instruments, refer to para. 8.3.

8.5 Standard Gaging Method of Threaded Ends

The standard method of gaging the external and internal threaded ends shall be in accordance with the requirements of ANSI/ASME B 1.20.1,

8,6 Alignment

The maximum-allowable deviation in the angular alignment of any opening shall be 0.06 in./ft (5 mm/m) (0.5%).

9 THREADED ENDS

9.1 Thread Type

Fitting threads shall be right hand, conforming to ANSI/ASME B1.20.1, Pipe Threads, General Purpose (Inch). They shall be taper

threads (NPT).

9.2 CountersInk or Chamfer

All internal threads shall be countersunk a distance not less than one-half the pitch of the thread at an angle approximately 45

deg with the axis of the thread, and all external threads shall be chamfered at an angle of 30 deg to 45 deg from the axis, for

easier entrance in making a joint and prutectkm of the thread. Countersinking and chamfering shall be concentric with the threads.

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