Precision Instrument Pipe Fittings
Hoke Precision Instrument Pipe Fittings are manufactured with high quality NPT tapered threads in a wide variety of configurations to provide broad application capabilities.
Download the Hoke Precision Pipe Fittings catalog (PDF: 10 pages, 402 KB)
Threads
Threads utilized on Hoke Precision Instrument Pipe fittings are National Pipe Taper (NPT) which exceed the requirements of ANSI B1.20.1.
Pressure Ratings
Pressure ratings for temperatures up to 100° F are identified for each individual pipe fitting in the dimensional data charts.
Temperature*
Temperatures noted below apply to basic fitting capabilities. In all cases, consideration must also be given to the type of thread sealant used. For example, Teflon® tape has a maximum temperature rating of 450° F.
- 316 stainless steel: −325° F to +1200° F [−198° C to +648° C]
- Brass: −325° F to +400° F [−198° C to +204° C]
* Prolonged exposure to temperature over 800° F is not recommended.
Materials
Hoke Precision Pipe Fittings are available as standard in Brass and 316 Stainless Steel. Hoke pipe fittings can also be supplied in other materials including Monel, Hastelloy C, Inconel and Titanium and in special shapes. Specifi cations for standard materials are:
- 316 Stainless Steel Forgings ASTM A-182
- 316 Stainless Steel Bar Stock ASTM A-479
- Brass Forgings, Alloy 377 QQ-B-626
- Brass Bar Stock, Alloy 353 ASTM B-453
- Brass Bar Stock, Alloy 360 QQ-B-626
Heat Traceability
Hoke’s 316 Stainless Steel Precision Instrument Pipe Fittings are heat code traceable. To obtain certified material test reports (CMTR’S) for these components, place separate orders for such items and specify “CMTR’S required”.