Recent content by jack2100

Jasongreat thanks very much. I will check it out soon.

thanks, FredGarvin I think I need the gage to control that NPT thread.

yes. I am trying to control the depth of the engagement precisely. could you please give me some suggestion? I have no idea about that.

FredGarvin, thanks. my question is: how to control the parameters of NPT thread during the machining process? I have got the table of the NPT thread. I need to tap a NPT thread on a through hole and then screw a NPT fitting into it. if the major diameter of the end of the NPT thread hole is...

Benchtop, thanks for your help. how to determine the certain depth? is there any calculation method?

I care about the NPT dimensions(major/pitch diameter of the end of thread). in fact, I need to control the srewed depth of the NPT fitting. So the parameter of NPT thread should be controlled as precise as we can. So I wonder how the NPT thread is machined and how to control the quality.

Jasongreat,thanks very much. one question is what the screw depth should be appropriate for the given NPT thread? you know, the NPT thread is a taper thread, if the screw depth is different, the major diameter of the end of thread is not the same.

Jasongreat thanks.what kind of hole does it need? Do I need to drill a taper hole?

BenchTop, thanks. this is the tooling that I want to use.but I don't know how to control the parameter of the NPT thread. could you please give me some advise?

I want to tap a NPT (NPT-3/4) thread hole on a plate. And I found some related standards, these standards told me the detailed dimensions of the thread. My question is how to machine the NPT thread with a tap? How to control the parameter mentioned in the standards? thanks in advance!

maybe my descirption is unclear. my question is how to do the compression stress relaxation test of PTFE gasket? Now I used the teflon gasket for sealing. the PTFE has the aging issue. After 4 years or 6 years, the PTFE gasket may fail due to creeping, whatever. IS there any ASTM standard for...

I read the related standards about the PTFE gasket. But there is no stress relaxation test for the PTFE gasket, could you please tell me the reason? Thanks very much in advance!

Now this issue has been fixed. Thank you all.

FredGarvin, Thanks. I mentioned that NPT fittings used in our products. The torque was given. I check with our engineer, they told me that this torque is based on testing and is proved to be good value. The torque is vary in terms of material.

thanks dr dodge, I will check it. We use the swedgelok fittings in our products too.