Instrument Fittings
What are Instrument Fittings?
Instrument fittings are precision-engineered components designed to ensure leak-free connections in small-diameter piping and tubing systems, often used for gas, liquid, and instrumentation signal lines. These fittings are critical in high-pressure and high-purity applications such as oil & gas instrumentation, laboratories, pharmaceuticals, and chemical plants.
Key Features
- Leak-Proof Seal Design – Ensures zero leakage under high pressure.
- High Precision Manufacturing – Ideal for gas, vacuum, and fluid systems.
- Double Ferrule & Single Ferrule Options.
- Threaded, Compression & Welded End Types.
- Available in SS 316, Brass, Monel, etc.
Types of Instrument Fittings
- Male Connectors
- Female Connectors
- Union
- Tee
- Ferrules
Specifications
Mechanical Properties
Chemical Composition
Equivalent Grades
Weight Chart
Specifications
| Parameter | Details |
|---|---|
| Tube OD | 1/8" to 2" |
| Thread Types | NPT, BSPT, BSPP, ISO, UNF |
| Pressure Range | Up to 6000 PSI |
| Material Options | SS 316, Brass, Monel, Inconel |
| Standards | ASTM F1387, ASME B31.3, ISO 8434, DIN 2353 |
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa |
| Yield Strength | 205 MPa |
| Elongation | ≥ 30% |
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 16.0 – 18.0 |
| Nickel (Ni) | 10.0 – 14.0 |
| Molybdenum (Mo) | 2.0 – 3.0 |
| Iron (Fe) | Balance |
| Standard | Equivalent Grade |
|---|---|
| ASTM | A276 / A479 (SS 316), B16 (Brass), B164 (Monel 400) |
| EN | 1.4401 / 1.4436 (SS 316), CW617N (Brass), 2.4360 (Monel 400) |
| JIS | SUS 316 (SS), C3771 (Brass), NCF 400 (Monel 400) |
| IS | IS 6911 Grade 316, IS 319 (Brass), IS 1566 (Monel 400) |
| Fitting Type | Tube OD / Thread Size | Weight per 100 pcs (kg) |
|---|---|---|
| Straight Union | ½" | 9.20 |
| Elbow Connector | ¼" | 5.00 |
| Male Connector (NPT) | ⅜" | 4.80 |
| Female Connector (BSP) | ½" | 6.70 |
| Bulkhead Union | ¾" | 7.80 |
| Tube to Pipe Adapter | ½" | 6.90 |
| Ferrule Set (Front & Back) | ½" | 3.00 |
Applications of Instrument Fittings
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What’s the difference between single and double ferrule fittings?
Single ferrule fittings use one sleeve, while double ferrule fittings use a front and back ferrule for a more secure and vibration-resistant seal.
Are your fittings compatible with Swagelok® or Parker® systems?
Yes, our fittings are dimensionally compatible with major global brands, offering a cost-effective alternative.
Do you offer instrumentation valves with these fittings?
Yes, we provide needle valves, ball valves, and manifold valves designed for instrumentation use.
Can these fittings be used in high-purity applications?
Absolutely. We offer electropolished and passivated instrument fittings for use in cleanroom and high-purity environments.
