MM: That's certainly possible but the nipples look very clean when they arrive from the distributor. We have never considered that we should clean a standard brass fitting prior to assembly. But that is something to consider, prior exposure.
Tmoose: We have discontinued the product and are...
This is the summary from the lab analysis:
Two assembled water line control box couplings and three unassembled couplings were submitted for analysis to investigate the cause of cracking in five of the seven couplings. Results of the examination indicated the cracks were due to stress corrosion...
I have sent some of the split fittings to a lab and will let you all know the outcome.
There is no external stress on these assemblies. The two assemblies shown in the previous picture are contained end to end in a box. There are male fittings that connect to them through the box walls...
Correction to a bit of the info on the fitting, the original fittings we were used were marked PB, the second version that is described above and is what we have been using is marked P3. It's the 3900psi version.
Thanks for all the responses.
Wil, all the information I have on the fitting is this from the distributors catalog:
Extreme Pressure Brass Pipe Fitting
Material: Brass
Fabrication: Machined from bar
Max pressure: 3900 psi @ 72 F
Specs met: ANSI/ASME B1.20.3; ASTM B124; ASTM B16; ASTM B453...
We have been building a simple coolant box that has two pipes going through it. One has an electric valve on it and one has a check valve. All the parts are brass. There are 4 brass 3/8 NPT female to female couplers, one on each end of each pipe. Early in the manufacture, we had returns due...
