Engineering Overview: Tube Union & Connectors
Shrushti Metal is an ISO 9001:2015 and CE certified manufacturer, stockholder, and supplier of high-integrity Tube Union & Connectors based in Kumbharwada, Mumbai. Engineered for critical fluid power, analytical instrumentation, and high-pressure process systems, our tube unions and connectors deliver leak-tight, metal-to-metal sealing under severe vibration, thermal cycling, and pressure surges. Every component is precision-machined to ensure 100% mechanical interchangeability with Swagelok and Parker A-LOK fittings, giving engineers reliable performance at competitive direct-mill prices.
Our product lineup includes straight unions, male connectors, female connectors, and bulkhead connectors. Each assembly comprises a precision-machined fitting body along with applicable nuts, ferrules, or sealing components. Designed for both tube-to-tube and tube-to-pipe transitions, these fittings eliminate leakage risks in impulse lines, gas manifolds, and sampling systems. Fractional sizes from 1/16" to 2" and metric sizes from 2mm to 50mm are available from ready Mumbai stock for immediate 24-hour dispatch.
Figure 1: Exploded View of Shrushti Metal Tube Union Assembly — Fitting Body, Sealing Ferrules, and Compression Nut.
Technical Specifications & Product Information
Manufactured in strict compliance with international instrumentation dimensions, our tube union and connector fittings adhere to the following product specifications:
| Product Name | Tube Union & Connectors |
|---|---|
| Product Types | Straight union, male connector, female connector and bulkhead connector |
| Components | Fitting body and applicable nuts, ferrules or sealing components |
| Customization | Available in different sizes, material grades, thread types, pressure ratings and connection configurations |
| Stainless Steel Grades | ASTM A403 WP304, WP304L, WP316, WP316L, WP321, 1Cr18Ni9Ti, 00Cr19Ni10, 00Cr17Ni14Mo2, etc. |
| Alloy Steel Grades | ASTM A234 WP12, WP11, WP22, WP5, WP9, WP91, 16MnR, Cr5Mo, 12Cr1MoV, 10CrMo910, 15CrMo, 12Cr2Mo1, etc. |
| Tube Size | Fractional (1/16" to 2") and metric sizes (2mm to 50mm), depending on manufacturer specifications |
| Connection Type | Tube-to-tube, tube-to-male thread and tube-to-female thread |
| Thread Options | NPT, BSPT, BSPP and metric, depending on configuration |
| Union Configuration | Equal-size and reducing configurations |
| Connector Configuration | Straight and bulkhead designs, with other configurations available |
| Sealing Method | Compression ferrule, threaded seal or other specified design |
| Pressure Rating | Depends on the product model and operating conditions (vacuum up to 10,000 PSI / 689 bar) |
| Applications | Instrumentation lines, process systems, gas distribution, hydraulic and pneumatic equipment |
Material Grades & Metallurgy
Material integrity determines operational longevity in harsh environments. We manufacture and stock Tube Union & Connectors in certified Stainless Steel and high-strength Alloy Steel:
Stainless Steel: ASTM A403 WP304, WP304L, WP316, WP316L, and WP321 (along with international equivalents 1Cr18Ni9Ti, 00Cr19Ni10, and 00Cr17Ni14Mo2). SS 316/316L contains 2-3% molybdenum, providing superior resistance to pitting and crevice corrosion in offshore marine, chemical, and petrochemical installations. SS 304/304L delivers dependable corrosion resistance for general pneumatic and utility lines, while SS 321 offers titanium stabilization for elevated-temperature service up to 870°C.
Alloy Steel: ASTM A234 WP12, WP11, WP22, WP5, WP9, WP91, 16MnR, Cr5Mo, 12Cr1MoV, 10CrMo910, 15CrMo, and 12Cr2Mo1. These chromium-molybdenum alloys provide superior creep-rupture strength, hydrogen resistance, and high-temperature integrity in power generation steam headers, cracking furnaces, and refinery hydroprocessing loops.
| Material Class | ASTM / Equivalent Grades | Key Characteristics | Primary Service Environment |
|---|---|---|---|
| Stainless Steel | WP304/304L, WP316/316L, WP321, 00Cr17Ni14Mo2 | Chloride pitting resistance, cryogenic toughness, anti-galling threads | Chemical processing, offshore platforms, gas sampling loops |
| Alloy Steel | WP12, WP11, WP22, WP5, WP9, WP91, 15CrMo | High creep-rupture strength, hydrogen embrittlement immunity | Thermal power steam lines, cracking furnaces, refinery units |
Product Types & Configurations in Stock
We offer comprehensive configurations tailored to plant piping layouts and instrumentation routings:
Our precision tube unions and connectors are available in equal-size and reducing union configurations, allowing smooth transitions between different fractional or metric lines without additional pipe fittings. Bulkhead connectors include heavy-duty locknuts and sealing gaskets for vibration-proof installation through panels and enclosures. The precision-engineered compression ferrule creates a leak-tight radial bite, preventing tube blowout under severe hydraulic pressure surges while preserving flow dynamics and tube wall integrity across demanding industrial process operations.
Straight Union
Joins two collinear tubes of equal or reducing outside diameters, establishing a continuous flow path with zero pressure drop.
Male Connector
Connects instrumentation tubing directly to female threaded ports using precision male NPT, BSPT, BSPP, or metric threads.
Female Connector
Provides a leak-proof transition from tubing runs into male pipe fittings, pressure transmitter stubs, or sampling probes.
Bulkhead Connector
Features extended body threads and locknuts to route tubing safely through control panels, firewall bulkheads, and vessel walls.
Sealing Methods & Industrial Applications
Our fittings utilize advanced double-ferrule compression sealing or precision threaded seals to ensure gas-tight containment up to 10,000 PSI (689 bar), depending on tube outer diameter, wall thickness, and operating temperatures ranging from cryogenic -196°C to +649°C.
Applications span critical industrial sectors:
- Instrumentation Lines: Differential pressure transmitters, flowmeters, and analytical sampling systems.
- Process Systems: Chemical processing loops, offshore oil and gas rigs, and pharmaceutical fluid handling.
- Gas Distribution: Compressed natural gas (CNG), hydrogen, nitrogen, and oxygen pipeline manifolds.
- Hydraulic & Pneumatic Equipment: High-pressure fluid power, heavy machinery actuation, and turbine control circuits.
Every batch undergoes rigorous quality control, including Positive Material Identification (PMI), hydrostatic proof testing at 1.5x design pressure, and pneumatic submerged bubble leak testing. All shipments include EN 10204 Type 3.1 inspection test certificates and third-party inspection clearances from Lloyd’s Register, TUV, and Bureau Veritas.
Major Cities We Supply To (South India & Pan-India)
Shrushti Metal supplies ex-stock materials daily from our Mumbai central steel hub in Kumbharwada to key industrial corridors across Southern India. With established logistics tie-ups with leading freight carriers (V-Trans, TCI Express, SafeXpress), shipments reach southern hubs within 24 to 48 hours: