Stainless Steel 316 Pipe Fittings

Stainless Steel 316 pipe fittings form the backbone of industrial piping systems requiring exceptional durability and chemical resistance. Our manufacturing process employs hot forging and precision machining techniques on certified ASTM A182 F316/F316L raw materials, ensuring dimensional accuracy within ±0.05mm tolerances. These pipe fittings undergo solution annealing heat treatment at 1038-1149°C followed by rapid cooling to achieve optimal microstructure and corrosion resistance properties. The surface finish options include standard mill finish, 2B finish, and electropolished surfaces with Ra values ranging from 0.4-0.8 micrometers for sanitary applications.

316 Stainless Steel Fittings

Our 316 Stainless Steel fittings Like Stainless Steel Tees, Stainless Steel Elbows , Stainless Steel Crosses, etc. are manufactured in accordance with ASME B16.11, MSS SP-79, and MSS SP-83 standards, offering socket weld, threaded, and butt weld end connections. The molybdenum-enhanced composition provides superior resistance to chloride-induced stress corrosion cracking and pitting corrosion in marine environments and chemical processing applications. Each fitting is marked with grade identification, pressure rating, and manufacturer’s trademark for traceability. Our quality assurance program includes 100% dimensional inspection, hydrostatic pressure testing at 1.5 times working pressure, and material verification through positive material identification (PMI) testing.

Stainless Steel 316 Compression Fittings

Stainless Steel 316 compression fittings provide leak-tight connections for instrumentation and process control applications without requiring welding or threading. These fittings utilize a ferrule-based sealing mechanism that creates metal-to-metal contact under compressive forces, suitable for pressures up to 6000 PSI and temperatures ranging from -40°F to +400°F. Our compression fittings are manufactured with precision-machined threads conforming to NPT, BSP, and metric standards, with surface roughness maintained below Ra 0.8 micrometers on sealing surfaces to ensure optimal performance and reliability in critical applications.

Stainless Steel 316 Threaded Fittings

Stainless Steel 316 threaded fittings offer versatile connection solutions manufactured according to ASME B16.11 Class 3000, 6000, and 9000 pressure ratings. The threading process employs CNC thread milling machines ensuring precise thread geometry with 60-degree thread angle and appropriate pitch conforming to ASME B1.20.1 specifications for NPT threads. These fittings feature beveled edges to facilitate easy assembly and are available in standard wall thickness configurations providing working pressures from 1000-6000 PSI depending on size and temperature conditions. Each threaded fitting undergoes thread gauge verification and pressure testing to ensure leak-proof performance.

Sanitary Stainless Steel Fittings

Sanitary Stainless Steel fittings are specially designed for pharmaceutical, food processing, and biotechnology applications requiring ultra-hygienic conditions and easy cleaning capabilities. These fittings feature tri-clamp, DIN, and SMS end connections with electropolished internal surfaces achieving Ra values below 0.4 micrometers to prevent bacterial growth and facilitate complete drainage. Manufacturing processes include precision welding with full penetration joints, followed by solution annealing and electropolishing treatments. All sanitary fittings comply with FDA 21 CFR 177.2600, 3-A Sanitary Standards, and EHEDG guidelines for hygienic equipment design.

Stainless Steel Hydraulic Fittings

Stainless Steel hydraulic fittings are engineered for high-pressure hydraulic systems in marine, offshore, and corrosive environments where standard Carbon Steel fittings would fail due to corrosion. These fittings feature heavy-wall construction and specialized sealing configurations including O-ring face seal (ORFS), JIC 37-degree flare, and NPT threaded connections. Manufacturing involves cold forming processes to enhance material strength and dimensional stability under cyclic pressure loads. Working pressures range from 3000-6000 PSI with burst pressures typically four times the working pressure, ensuring safety factors required for critical hydraulic applications.

Stainless Steel Flanges and Couplings

Stainless Steel flanges and couplings provide robust connections for large diameter piping systems and equipment interfaces. Our flange manufacturing encompasses weld neck, slip-on, socket weld, threaded, lap joint, and blind configurations conforming to ASME B16.5, B16.47, and DIN standards. The forging process utilizes certified ASTM A182 F316/F316L materials heated to appropriate forging temperatures and shaped using hydraulic presses with capacities up to 3000 tons. Surface finishes include raised face (RF), flat face (FF), and ring type joint (RTJ) with surface roughness specifications ranging from 125-250 microinches as per ASME standards.

Stainless Steel 316 Tube Fittings

Stainless Steel 316 tube fittings are precision-engineered for instrumentation and small-bore piping applications requiring leak-tight connections and easy installation. These fittings utilize advanced compression technology with double ferrule systems providing vibration-resistant seals suitable for pressures up to 20,000 PSI depending on tube size. Manufacturing involves precision machining of certified bar stock materials with surface treatments including passivation and electropolishing to enhance corrosion resistance. Each tube fitting undergoes helium leak testing to ensure zero-leakage performance critical for process control and analytical instrumentation applications.

Stainless Steel 316 (SS316) – Detailed Explanation

SS316 is an austenitic stainless steel alloy that belongs to the 300 series. It is one of the most widely used grades, especially where high corrosion resistance is required.

 Chemical Composition (Approximate %)

Key Difference vs SS304: SS316 contains 2-3% molybdenum, making it far superior in marine, chemical, and chloride-rich environments.

1. Stainless Steel Fittings

These are widely used in fluid, gas, and structural applications:

A. Pipe & Tube Fittings

• Elbows (45°, 90°, 180°)

• Tees (equal & reducing)

• Cross fittings

• Couplings & half couplings

• Reducers (concentric & eccentric)

• Unions

• Caps & plugs

• Stub ends & lap joint flanges

B. Threaded & Compression Fittings

• Hex nipples

• Hex reducers

• Ferrule fittings (single & double)

• Swagelok-type compression fittings

• BSP, NPT, and SAE threaded adapters

• Banjo fittings

C. Hydraulic & Pneumatic Fittings

• Hydraulic hose fittings

• Quick-release couplings

• ORFS (O-ring face seal) fittings

• JIC 37° flare fittings

• DIN 24° cone fittings

D. Flanges & Connectors

• Weld neck flanges

• Slip-on flanges

• Blind flanges

• Socket weld flanges

• Lap joint flanges

2. CNC-Machined Stainless Steel Parts

CNC machining is used to create precision components from SS grades like SS304, SS316, SS410, SS431, and duplex stainless steels.

A. Automotive & Aerospace Parts

• Shafts & axles

• Gear blanks & sprockets

• Bushings & bearing housings

• Turbocharger components

• Manifold blocks

• Brake system adapters

B. Industrial & Engineering Components

• Valve bodies & valve seats

• Pump impellers & housings

• Sealing glands & retainers

• Instrumentation housings

• Heat exchanger components

• Actuator parts

C. Fasteners & Connectors

• Hex bolts, socket-head bolts, studs

• Screws (machine, self-tapping, and set screws)

• Nuts (nylock, flange, dome, and coupling)

• Washers (plain, spring, conical)

• Dowel pins & locating pins

D. Custom Precision Parts

• Sensor housings

• Medical surgical components

• Marine hardware (cleats, hinges, handles)

• Instrument panels & brackets

Q1: What is the difference between 316 and 316L Stainless Steel fittings?

316L has lower carbon content (0.03% max vs 0.08% max), providing better corrosion resistance in welded conditions and eliminating carbide precipitation. 316L is preferred for critical applications requiring post-weld corrosion resistance.

Q2: What is the maximum working pressure for SS 316 fittings?

Maximum working pressure ranges from 1000-6000 PSI depending on fitting size, type, and temperature. Smaller sizes (1/8″ to 1/2″) typically handle 6000 PSI, while larger sizes (1-1/2″ and above) are rated for 3000 PSI at ambient temperature.

Q3: Are your fittings suitable for food grade applications?

Yes, our sanitary Stainless Steel 316L fittings comply with FDA 21 CFR 177.2600 regulations. They feature electropolished surfaces with Ra values below 0.4 micrometers and tri-clamp connections for easy cleaning and sterilization.

Q4: What testing procedures do you follow for quality assurance?

Each fitting undergoes dimensional inspection, hydrostatic pressure testing at 1.5x working pressure, PMI testing for material verification, surface finish measurement, and thread gauge verification. Complete test certificates are provided with shipments.

Q5: Can you provide custom dimensions and specifications?

Absolutely. We manufacture custom Stainless Steel 316 fittings according to customer drawings and specifications. Our engineering team provides design support and feasibility analysis for special applications with minimum order quantities starting from 100 pieces.

Q6: What is your standard delivery time?

Standard delivery time is 4-6 weeks for regular production quantities. Express delivery options are available for urgent requirements. Custom fittings may require 6-8 weeks depending on complexity and quantity.

Q7: Do you provide material certificates and test reports?

Yes, we provide complete material test certificates (MTC) per EN 10204 Type 3.1, including chemical composition, mechanical properties, heat treatment details, and dimensional inspection reports for full traceability.

Q8: Are your fittings suitable for high-temperature applications?

SS 316 fittings are suitable for continuous operation up to 400°C (752°F). For higher temperature applications up to 650°C, we recommend 316H grade with higher carbon content for improved high-temperature strength.

Q9: What surface finishes are available?

Available finishes include mill finish, 2B finish (cold rolled and annealed), electropolished (Ra 0.4μm or better), and mechanical polishing. Sanitary applications typically require electropolished surfaces for optimal cleanability.

Q10: How do you ensure corrosion resistance in marine environments?

Our 316 grade fittings contain 2-3% molybdenum, providing superior pitting and crevice corrosion resistance in chloride environments. Solution annealing heat treatment optimizes the microstructure for maximum corrosion resistance.