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Small and medium caliber Threaded Pipe Fittings Stainless Steel custom

Small and medium caliber Threaded Pipe Fittings Stainless Steel Manufacturers

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Precision Stainless Steel Threaded Pipe Fittings

Stainless steel threaded pipe fittings provide the quickest and most versatile method of creating small-bore pipe connections without the need for welding equipment or hot work permits. Our range of small and medium caliber threaded fittings—including elbows, tees, couplings, unions, bushings, and nipples—is manufactured from 304 and 316L stainless steel bar and forged blanks, precision-machined to NPT (National Pipe Taper), BSP (British Standard Pipe), and metric thread standards. The combination of stainless steel metallurgy and precision threading delivers a corrosion-resistant, leak-free connection that is fully disassemblable for maintenance access. As a specialized manufacturer, we invest heavily in thread-form precision, cutting each fitting to tighter tolerances than the minimum standard requirements to ensure smooth assembly and reliable sealing. Our threaded fittings are available in Class 150 (standard pressure) and Class 3000 (high pressure) ratings, covering the full range of small-bore instrumentation, utility, and process piping connection requirements from 1/8 inch to 4 inches nominal bore.

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Threaded Fitting Technical Specifications

ParameterSpecification Detail
Material GradesASTM A182 F304/F304L, F316/F316L (UNS S30400/S31603)
Thread StandardsASME B1.20.1 (NPT), BS 21 (BSPT), DIN 2999 (Rp)
Design StandardASME B16.11 (Class 2000/3000/6000), BS 3799
Pressure RatingClass 150 to Class 3000 (per ASME B16.11)
Size Range1/8" to 4" (DN6 - DN100)
Surface FinishPickled & Passivated, Electropolished (optional)

Instrumentation & Utility Applications

Stainless steel threaded fittings are the standard connection method for instrumentation and small-bore utility piping throughout the process industries. In oil and gas facilities, they connect pressure gauges, thermowells, flow indicators, and level instruments to main process lines. Chemical plants use them for chemical injection quills, sample point connections, and vent and drain takeoffs on stainless steel process headers. Pharmaceutical facilities use 316L threaded fittings for compressed gas distribution, CIP chemical supply, and instrument air connections in cleanroom environments. The food and beverage industry specifies stainless threaded fittings for utility services including compressed air, CO2 injection, and potable water connections adjacent to production equipment. Marine and offshore applications use 316L threaded fittings for small-bore instrument impulse lines, hydraulic control lines, and chemical injection manifolds on subsea trees and topside equipment. HVAC systems use them for condensate collection, chemical dosing, and pressure gauge connections on chillers and heat exchangers.

Installation & Corrosion Advantages

  • No Hot Work Required: Threaded assembly eliminates the need for welding, hot work permits, and post-weld heat treatment, dramatically simplifying installation in operational facilities.
  • Full Disassembly: Threaded connections can be broken and remade without pipe cutting, enabling easy access for instrumentation calibration, equipment maintenance, and process modifications.
  • 316L Corrosion Resistance: Molybdenum content provides superior pitting resistance compared to 304 SS, making 316L the correct choice for marine, offshore, and chemical service environments.
  • Wide Thread Standard Availability: Available in NPT, BSP, and metric threads, ensuring compatibility with international instrumentation and equipment from any global manufacturer.

Commercial & Packaging Information

We support payments via T/T, PayPal (sample orders), and L/C. Stainless steel threaded fittings are stocked in a wide range of sizes, grades, and thread standards for immediate dispatch. Each fitting is individually plastic-capped to protect the thread form during transit and storage. Small fittings are packed in labeled polybags and placed in compartmentalized cartons for easy counting and identification. Larger fittings are individually bagged and boxed. All fittings are supplied with 3.1 Mill Test Certificates and PMI verification reports confirming the stainless steel grade. For pharmaceutical and food industry applications, FDA material compliance letters are available. Express courier delivery (DHL/FedEx/UPS) is available for urgent maintenance requirements worldwide.

  • Q: Should I use NPT or BSP threads for a stainless steel threaded fitting application?
  • A: NPT (National Pipe Taper) is the standard in North America and is widely used in oil and gas applications globally. BSP (British Standard Pipe) is standard in Europe, Asia, Australia, and most of the rest of the world. Always match the thread standard to your instrumentation, valve, and pipe thread specification to ensure a leak-free assembly.
  • Q: Are PTFE tape and pipe dope compatible with stainless steel threaded fittings?
  • A: Yes, PTFE tape is the most common and compatible thread sealant for stainless steel NPT and BSP threads in most services. For higher-pressure or high-temperature steam applications, a specialized anaerobic thread sealant compound rated for the service conditions should be used.
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Jiangyin Gaoxin Pipe Fittings Co., Ltd.
About Us
JIANGYIN GAOXIN PIPE FITTINGS CO.,LTD.
Our company is a professional manufacturer of pressure piping components. As Small and medium caliber Threaded Pipe Fittings Stainless Steel Manufacturers，Our product range covers butt-weld, socket-weld, and threaded pipe fittings, including flanges and customized non-standard parts. These products are widely used in industries such as oil & gas, chemical processing, power generation, shipbuilding, papermaking, metallurgy, pharmaceuticals, and food processing. We manufacture according to standards such as ASME, EN,JIS,DIN,ANSI,GOST, MSS, GB/T,HG, DL, SH, SY,and have a complete range of inspection equipment, a strict quality control system, and various certifications（PED,AD2000,EAC, ABS,BV, DNV,NORSOK M650, ISO9001,ISO14001,ISO45001,etc.）, making us a leader in the industry.

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