ASME B16.51-2013 pdf – Copper and Copper Alloy Press-Connect Pressure Fittings.
12.2 Optional Gaging Method of Press-Connect Pressure Fittings
For gaging the diameter tolerance of external and internal ends, the rise of direct reading instruments instead of ring and plug gages as specified in para. 12.1 shall be permitted. When gaging the diametcn of esternal and internal ends using direct reading instniments. refer to par.i. 9.2.
12.3 Standard Gaging Method of Threaded Ends
The standard method of gaging the externally and internally threaded ends shall be in accordance with the requirements of ASME 111.2(L).
NOTE: In gagrng pipe threads, it is acceptable and common practice to rap or tap the pail to ensure pruper seating o the gage. Htwvr, it is first necrisary to clean bn4h the gage and the pmducl threads to ensure that they are free ot chips. burrs, abrasives, or other loivign materials.
11w manufacturer of press connection fittings shall provide instructions for the installation of the fittings, The instructions shall provide a minimum of
(a) i-nd preparation of the tube
(1’) assembly of copper tube to the fitting
(c) requirements for the tool used to form the press- connect joint
(d pressing procedure
Installation instructions shall include details to enable assemblers to install fittings with performance consistent with that demonstrated by the design qualification testing described in section 14.
The pressure-temperature ratings are only applicable to fittings that are installed in accordance with the manulacturer s instructions.
14.1 General
Press-connection fitting shall be qualified with the performance tests defined herein. The fittings shall be tested with both ASTM Type K and Type M hard drawn tube, so two sets of tests are required, except for the thermocycle test described in para. 149.
Manufacturers shall retain test reports dernnnstratmg compliance with this Standard. For any design change, the performance tests shall be repeated.
Press-connection of the test assemblies shall be done according to the fitting manufacturer’s installation instructions. Each test shall be perlormed on a new test assembly.
14.2 Hydrostatic Pressure Test at 20C (68°F)
14.2.1 Test Assembly. The test assembly shall contain a press-connection titting lecated between two sections of copper tube as shown in Fig. 4. The sample shall not be restrained in the test assembly. The sample shall be filled with water to a pressure of 4 144) kPa ± 54) kPa (6(u) psi ± 7 psi) at a temperature of 20°C ± 5C (68°F ± 9F) for a period of 48 h,
14.2.2 Acceptance Criteria. During the first hour, the maximum slippage of each joint shall be as specified in Table 2 (Lible 1-2). Once the 1-h slippage is recorded, the maximum additional slippage after the First hour shall not exceed the distance specified in table 2 (table 1-2). During the test, there shall be no visible leakage of the joint.
14.3 Unrestrained Hydrostatic Pressure Test At 93°C
14.3.1 Test Assembly. The test assembly shall con. Lain a press-conrwct fitting located between two se1ions of copper tube as shown in Fig. 4. The sample shall not be reahained in the teat assembly. The sample shall be Filled with water to a pressure of 4 140 kPa ± 50 kPa (600 psi ± 7 psi) and held at a temperature oi93C ± 2C (200°F ± 5°F) for a period of 48 h.
14.3.2 Acceptance Criteria. The acceptance criteria shall be as defined in para. 14.2.2.
14.4 Static Torque Test
14.4.1 Test Assembly. Prepare samples with a copper pressconnect coupling oLning two equal lengths hard drawn copper tube. One end of the test assembly shall be fised and thc other end fabricated to accommodate a moment arms as shown in Fig. 5. E4ch test aseinbly with a press-connect fitting shall have a minimum torque applied as specified in Table 3 (Table 1-3).
Alter applying the torque. release the force and subject the sample to a water pressure test of 2 760 kPa ± 50 kPa (400 psi ± 7 psi) gage pressure for a period of 48 h at a temperature of 20°C ± 5°C (6SF ± 9°F).