Stainless Steel Stud End Pipe Fitting 304 316 Threaded Male Stud End

Product Specification

**1. Product Description**
This stainless steel stud end is a male-threaded pipe fitting designed for connection to female-threaded components such as valves, unions, equipment ports, or pipe lines. It features a threaded end (NPT or BSP) and a cylindrical body, available in 304 and 316/316L stainless steel grades. The stud end provides a secure, leak-resistant mechanical joint without welding, making it suitable for applications requiring frequent assembly and disassembly.

**2. Key Specifications**
- Material: Stainless Steel 304/304L, 316/316L (ASTM A182 F304/F316)
- Thread Type: NPT (ASME B1.20.1) / BSPP / BSPT
- Pressure Class: Class 3000 / 6000 (ASME B16.11 for forged threaded fittings) 
- Nominal Size: 1/8” – 4” (DN6 – DN100)
- Chemical Composition (304): Cr 18–20%, Ni 8–11% 
- Chemical Composition (316): Cr 16–18%, Ni 10–14%, Mo 2–3% 
- Mechanical Properties (F304/F316): Tensile ≥515 MPa, Yield ≥205 MPa 
- Surface Treatment: Pickled, passivated, or solution annealed
- Standards: ASME B16.11 (forged threaded fittings), ASTM A182

**3. Applications**
Widely used in petroleum, chemical processing, power generation, natural gas, water treatment, and general industrial piping. The 316 grade is preferred for chloride-bearing, marine, and mildly acidic environments due to its molybdenum content . Stud ends are commonly used for instrument connections, small-bore piping, and equipment tie-in points.

**4. Product Advantages**
- 316 grade offers superior pitting resistance (PREN ~24–28) compared to 304 (PREN ~18–20) in chloride environments 
- “L” grades (304L/316L) prevent sensitization and intergranular corrosion after welding or elevated-temperature exposure 
- Male thread allows direct connection to female ports without additional adapters
- No welding required, simplifying installation and enabling easy disassembly
- Compact design suitable for tight spaces and instrument connections
- Available in multiple thread standards for global compatibility

**5. Product Functions**
The stud end provides a male-threaded interface for connecting pipe, tubing, or equipment to female-threaded components. It transfers fluid or gas while maintaining a sealed joint under pressure. The threaded connection allows for assembly, adjustment, and maintenance without permanent joining methods.

**6. Instruction for Use**
- Verify thread type (NPT/BSP), size, and material grade match the mating component.
- Inspect the threads for damage, debris, or galling before assembly.
- Clean threads; apply PTFE tape or an approved thread sealant/lubricant if permitted by the application .
- Hand-tighten the stud end into the female port, then tighten with a wrench to the specified torque. Avoid cross-threading.
- For stainless-to-stainless threaded connections, use an anti-seize compound to reduce galling risk .
- Perform a pressure test after installation to confirm no leakage.

**7. Precautions**
- Stainless steel threads are prone to galling (cold welding) during assembly; use anti-seize lubricant and tighten slowly .
- Do not exceed the rated pressure class of the fitting.
- Keep 304/316 stud ends away from contact with carbon steel to prevent galvanic corrosion.
- Do not use damaged or galled fittings; replace rather than attempt to restore seized threads .
- Ensure the pipeline is depressurized and drained before installation or removal.
- Verify material certificates (MTC) include heat number and chemical/mechanical properties.

**8. Shipping Information**
- Standard export packing: carton or wooden case with moisture-proof wrapping.
- Dispatch within 3–7 working days for stock items; 15–30 days for customized or bulk orders.
- Shipping methods: sea freight, air freight, or express courier depending on quantity and destination.
- Tracking number provided upon dispatch.

**9. Payment Terms**
- T/T (bank transfer): 30% deposit, 70% balance before shipment.
- L/C at sight accepted for larger orders.
- PayPal / Western Union for sample orders.
- All prices are quoted EXW or FOB unless otherwise specified.

**10. Packaging**
- Each stud end is wrapped in plastic film or bubble bag.
- Multiple pieces are packed in sturdy cartons or wooden cases.
- Desiccant is added for sea shipments to prevent moisture.
- Threads are protected with caps or plugs to prevent damage during transport.
- Custom labeling and marking available upon request.

**11. Return & After-Sales Policy**
- 7-day return or exchange for quality defects (buyer bears return freight unless the defect is verified as our responsibility).
- Custom-made or non-stock items are not eligible for return unless defective.
- Warranty period: 12 months from delivery for manufacturing defects.
- Claims for shortage or damage must be reported within 3 working days of receipt with photo evidence.
- Technical support available for thread selection, material compatibility, and installation guidance.