Description
Repute Pipe Fittings are precision machined from forgings for elbows, tees and crosses and from bar stock for straight connectors. These are designed to be used for process control and instrumentation connections between pipe sizes and tube sizes.
Each fitting is thoroughly cleaned to eliminate system contamination and improve surface finish to enhance the performance and appearance. Pipe Fittings are manufactured from materials meeting applicable ASTM or ASME specifications, with pipe threads to meet or exceed ANSI/ASME B1.20.1 requirements.
Material Standards:
| Material | Straight Fittings | Shaped Fittings |
| SS 316 | ASTM A 276 | ASTM A 182 |
| Brass | ASTM B 453 | – |
| Steel | ASTM A 108 | – |
Thread Specifications:
| Thread Type | Standard / Specification |
| NPT | ASME B1.20.1 |
| ISO/BSP Parallel (BSPP) | ISO 228 |
| ISO/BSP Tapered (BSPT) | ISO7/1 |
| Unified (SAE) | ASME B1.1 |
Temperature Ratings:
Temperature rating for pipe fittings is limited by the thread sealant and the gasket or O-ring material as applicable. Refer below table for maximum allowable temperature ratings. To know the correct temperature rating consideration must also be given to the type of thread sealant used.
| Material | Maximum Temperature °F (°C) |
| SS 316 | 1000 (537) |
| Brass | 392 (200) |
| Steel | 375 (190) |
Temperature De-rating Factor:
| Temp. | °F | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 | 1200 |
| °C | 38 | 93 | 149 | 204 | 260 | 316 | 271 | 427 | 482 | 538 | 649 | |
| Factor | stainless Steel | 1.00 | 1.00 | 1.00 | 0.97 | 0.9 | 0.85 | 0.82 | 0.8 | 0.78 | 0.77 | 0.49 |
| Brass | 1.00 | 0.78 | 0.69 | 0.13 | – | – | – | – | – | – | – | |
| Steel | 1.00 | 0.94 | 0.91 | 0.88 | – | – | – | – | – | – | – |
Pressure Ratings:
Pressure ratings listed are for temperature up to 37℃ (100℉). Pressure rating is calculated at -28 to 37℃ (-20 to 100℉) using allowable stress value of 20000 psi for SS316, 10000 psi for Brass, and 20000 psi for Carbon Steel as per ASME B31.3 Process Piping Code. While determining pressure ratings in accordance with B31.1 power piping, multiply below pressure rating values by a factor 0.94 for MOC stainless steel and by 0.85 for MOC Steel. Brass rating values remains unchanged.
| NPT Size | Pressure Rating in PSI (Female Threads) | |
| SS 316 / Steel | Brass | |
| 1/16″ | 6800 | 3500 |
| 1/8″ | 6800 | 3500 |
| 1/4″ | 6800 | 3000 |
| 3/8″ | 5500 | 3000 |
| 1/2″ | 5000 | 3000 |
| 3/4″ | 4800 | 2500 |
| 1″ | 4500 | 2500 |
| 11/4″ | 4500 | 2200 |
| 11/2″ | 4000 | 2200 |
| 2′ | 4000 | 2000 |
| NPT Size | Pressure Rating in PSI (Male Threads) | |
| SS 316 / Steel | Brass | |
| 1/16″ | 11000 | 5000 |
| 1/8″ | 10000 | 4500 |
| 1/4″ | 8000 | 4000 |
| 3/8″ | 7500 | 4000 |
| 1/2″ | 7500 | 4000 |
| 3/4″ | 7000 | 3500 |
| 1″ | 5000 | 3000 |
| 11/4″ | 5000 | 3000 |
| 11/2″ | 4500 | 2500 |
| 2′ | 4000 | 2000 |
To ensure a leak-tight seal, the use of a pipe thread sealant is recommended. The most effective and recommended thread sealant is PTFE Tape.
Installation with PTFE Tape:
PTFE tape should be used only on male tapered pipe threads. The chart below provides information regarding the suggested tape width.
| Thread Size | Suggested PTFE Tape Width |
| 1/8″ | 18″ or 1/4″ |
| 1/4″ | 1/4″ |
| 3/8″ | 1/4″ |
| 1/2″ | 1/4″ or 1/2″ |
| 3/4″ | 1/2″ |
| 1″ | 1/2″ |
- Clean both male and female tapered threads.
- Wrap tape in the direction of the male tapered thread.
- Two to three wraps are suggested for stainless steel tapered pipe threads.
- Ensure tape does not overhang the first thread, as the tape might shred and enter the fluid system.
- Cut off excess tape and the connection is now ready for use.
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