Tube Fittings
Leak-proof double compression tube fittings from 1/16" to 2½" — unions, tees, connectors, elbows, bulkhead unions, caps and plugs.
Product Overview
Tube fittings connect instrument and process tubing without welding, giving a leak-tight joint that can be remade during maintenance. We stock double compression fittings, ball valves, needle valves and check valves from 1/16" to 2½".
Material options run from standard stainless steel through duplex, Monel, Inconel, Hastelloy and cupro nickel to carbon and alloy steel. Silver plating is available for anti-galling on threaded components.
- Size: 1/16" to 2½"
- Type: Double compression (twin ferrule)
- Extra service: Silver plating
- Also available: Ball, needle and check valves
- Specification: ASTM / ASME / ANSI / DIN
Specifications
| Parameter | Details |
|---|---|
| Size | 1/16" to 2½" |
| Fitting type | Double compression tube fittings |
| Valves | Ball valve, needle valve, check valve |
| Other services | Silver plating |
| End connections | Tube, male NPT / BSP, female NPT / BSP |
Grades & Standards
Stainless Steel
Gr. 304, 304H, 309, 310, 316, 316L, 317L, 347, 321, 904L
Duplex Stainless Steel
UNS S31803, S32750, S32760
Carbon Steel
ASTM A105
Alloy Steel
Gr. 5, Gr. 9, Gr. 11, Gr. 12, Gr. 22, Gr. 91
Cupro Nickel
C70600 (90:10), C71500 (70:30)
Nickel & Monel
UNS N02200, N02201, N04400, N05500, Alloy 20
Inconel & Incoloy
UNS N06600, N06601, N08800, N08810, N08825
Hastelloy
UNS N10276, N06022, N10665, N06455
Types Available
- Union tee
- Female tee
- Branch tee
- Run tee
- Male connector
- Female connector
- Elbow
- Bulkhead union
- Reducing union
- OD cap
- OD plug
Dimension Chart
| Tube OD (imperial) | Tube OD (metric) | Typical service |
|---|---|---|
| 1/16" – 1/8" | 1.6 mm – 3 mm | Analyser & sampling lines |
| 1/4" – 3/8" | 6 mm – 10 mm | Instrument impulse lines |
| 1/2" – 3/4" | 12 mm – 20 mm | Utility and hydraulic lines |
| 1" – 1½" | 25 mm – 38 mm | Process tubing |
| 2" – 2½" | 50 mm – 63 mm | Large bore tubing |
Dimensions are reference values from the governing standard. Please confirm the exact dimensions and tolerances against the current edition of the standard before ordering.
Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|---|
| SS 304 | ≤ 0.08 | ≤ 2.00 | ≤ 0.75 | ≤ 0.045 | ≤ 0.030 | 18.0–20.0 | 8.0–10.5 | — | — |
| SS 316L | ≤ 0.035 | ≤ 2.00 | ≤ 0.75 | ≤ 0.045 | ≤ 0.030 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | — |
| Duplex 2205 (S31803 / S32205) | ≤ 0.030 | ≤ 2.00 | ≤ 1.00 | ≤ 0.030 | ≤ 0.020 | 21.0–23.0 | 4.5–6.5 | 2.5–3.5 | N 0.08–0.20 |
| Monel 400 (N04400) | ≤ 0.30 | ≤ 2.00 | ≤ 0.50 | — | ≤ 0.024 | — | ≥ 63.0 | — | Cu 28.0–34.0, Fe ≤ 2.5 |
| Carbon Steel A105 | ≤ 0.35 | 0.60–1.05 | 0.10–0.35 | ≤ 0.035 | ≤ 0.040 | ≤ 0.30 | ≤ 0.40 | ≤ 0.12 | Cu ≤ 0.40 |
Values are the usual requirements of the governing ASTM/ASME specification and are given for reference. The mill test certificate supplied with your consignment is the governing document.
Mechanical Properties
| Grade | Tensile strength (MPa, min) | Yield strength (MPa, min) | Elongation (%, min) | Hardness |
|---|---|---|---|---|
| SS 304 | 515 | 205 | 35 | 201 HB max |
| SS 316L | 485 | 170 | 40 | 217 HB max |
| Duplex 2205 | 620 | 450 | 25 | 293 HB max |
| Monel 400 | 480 | 170 | 35 | — |
| Carbon Steel A105 | 485 | 250 | 22 | 187 HB max |
Applications
Need Tube Fittings for your project?
Send us the grade, size and quantity — our team replies with a quotation promptly.
