304 Stainless Steel Male‑Female Coupling
2.Precision machined BSPT / NPT male & female threads for tight connection .
3.Hexagon body design, easy for wrench installation and disassembly .
4.Smooth inner bore lowers fluid resistance for stable medium flow .
5.Good high‑pressure and high‑temperature resistance for tough working conditions .
6.Accurate thread tolerance, effectively prevent water and air leakage .
7.Suitable for water, oil, gas pipeline and instrument gauge conversion connection .
8.Multiple sizes available, support customized thread requirements
Description
304 Stainless Steel Male‑Female Coupling
Engineered for reliable straight pipeline extension connection, our ASTM SS304 male‑female coupling serves as premium threaded fitting for water, oil and gas piping systems. It adopts precision‑machined BSPT / NPT male & female threads, realizing leak‑proof threaded joint and simplifying on‑site pipe extension installation. Manufactured from standard 304 stainless steel with smooth inner bore, the fitting delivers outstanding rust resistance and low fluid resistance during medium transportation. The straight‑body design ensures stable flow channel. It keeps stable sealing performance under long‑term high‑pressure and high‑temperature cyclic working conditions. Optional polishing surface finishing improves appearance quality and extends service life for indoor and outdoor piping projects. Regular stocked specifications cover mainstream pipe sizes for fast bulk shipment. Custom thread types, OEM laser logo engraving and special‑size machining services are available upon request. These 304 stainless steel male‑female couplings are widely applied in plumbing systems, heating networks, gas pipelines and general industrial piping facilities.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | 304 Stainless Steel Male‑Female Coupling |
| Pressure Class | Medium Pressure Grade |
| Raw Material | ASTM‑compliant SS304 stainless steel with compact uniform microstructure, excellent rustproof and anticorrosion performance |
| Surface Finish | Optional mirror polishing / matte treatment; smooth inner bore reduces fluid resistance |
| Connection Type | BSPT / NPT male & female thread connection; precisely machined threads for tight‑fitting, reliable leak‑proof performance |
| Working Temperature | -20℃ ~ 120℃ |
| Applicable Medium | Drinking water, heating circulating water, neutral industrial fluids, oil and gas media |
| Certification Standard | Produced following international standards for stainless steel threaded pipe components |
| Application Scenario | Plumbing pipe extension, heating networks, gas pipelines, industrial equipment, general piping projects |
Key Features
1.Superior Environmental Adaptability
Forged from ASTM‑certified 304 stainless steel, this male‑female coupling withstands humid coastal atmosphere, domestic water and weakly corrosive liquids. It keeps stable performance in outdoor piping and general industrial working environments for long‑term service life.
2.Reliable Thread Sealing Performance
Precision‑machined BSPT / NPT male & female threads ensure tight thread‑to‑thread engagement. Good sealing effect can be achieved with proper thread sealant, effectively preventing medium seepage under long‑term pressurized operation.
3.Straight Male‑Female Structure Simplifies Pipe Extension
Straight‑body male‑female coupling realizes straight pipeline extension and connection. Standard thread size matches common pipe fittings perfectly, simplifies on‑site piping layout and shortens construction period.
4.Smooth Inner Bore Optimizes Fluid Transport
Precision‑polished seamless inner bore lowers flow turbulence and pressure drop. Medium circulates steadily inside the pipeline to cut energy consumption of rear pumping equipment.
5.Diversified Scenarios & Flexible Customization
Suitable for plumbing extension, heating systems, gas pipelines and general industrial piping projects. Conventional sizes are stocked for bulk orders; customized wall thickness, laser marking and non‑standard dimension processing are supported for OEM cooperation.
Dimensions and Specifications
Our 304 stainless steel male‑female couplings cover a full range of standard inch sizes, mainstream specifications are listed below:
- 1/2", 3/4", 1"
- 1‑1/4", 1‑1/2", 2", 2‑1/2", 3", 4"
- Custom dimensions, OEM laser marking and dedicated export packaging services are available
Each fitting is manufactured under strict dimensional tolerance management. Its precision‑machined BSPT / NPT male & female thread structure matches standard threaded counterparts to sustain stable sealing performance, effectively preventing medium leakage during long‑term operation in diverse working scenarios.
Materials and Surface Treatments
1.Main Body Raw Material
Fabricated from ASTM‑compliant SS304 stainless steel, the male‑female coupling delivers outstanding rust and corrosion resistance against water, oil, gas and weak acidic media. It operates stably in food processing, chemical production, water treatment and marine piping systems for straight pipeline extension & connection.
2.Surface Finish
Standard pickling and passivation treatment forms a compact passive anticorrosive film to isolate rust, moisture and mild chemical erosion, supporting reliable use for indoor and outdoor industrial pipelines. Two surface options are available as requested: natural matte finish and mirror polishing finish.
3.Connection Processing
Adopt precision‑machined BSPT / NPT male & female threads with accurate thread pitch and tooth profile for smooth mating with standard threaded fittings. Proper thread sealant auxiliary ensures stable leak‑proof performance for long‑distance fluid transportation.
Standards and Certifications
Our products are manufactured in strict accordance with global industrial quality norms:
- Fabricated following official process specifications for stainless steel threaded pipe fittings
- Production system certified to ISO 9001 quality management standards
Prior to packaging and shipment, every 304 stainless steel male‑female coupling undergoes comprehensive testing. Inspection items include sealing reliability, thread dimensional accuracy and anticorrosion performance.
Applications
1.Petrochemical & Industrial Pipeline
Our 304 stainless steel threaded fittings work steadily in factory piping systems for water, gas, oil and low‑corrosion fluid transmission. They complete pipeline turning and branch connection to simplify later equipment maintenance and pipeline upgrading.
2.Shipbuilding & Marine Pipeline Systems
Commonly used for offshore domestic water supply, fuel delivery and heating pipe networks. Outstanding anti‑rust and salt‑spray resistant performance enables stable operation in damp, corrosive marine environments.
3.Food & Water Treatment Piping
Ideal for drinking water projects, beverage production lines and water treatment piping systems. 304 stainless steel meets high hygiene requirements and will not cause secondary pollution to transported media.
4.Heating & General Industrial Fluid Delivery
Suitable for central heating circulation pipelines, compressed air pipelines and various industrial fluid conveying lines. Standard threaded connection is easy to disassemble, which greatly improves efficiency during daily system maintenance.
Installation Instructions
- Thread Pre‑treatment: Clean the NPT/BSPT threaded sections and matching pipe threads; remove rust, oil stains and burrs before assembly.
- Controlled Torque Fastening: Tighten the fitting with appropriate torque. Excessive tightening shall be avoided to prevent thread deformation and sealing surface damage.
- Pressure Leak Test: Conduct pressure testing after installation to confirm reliable sealing of threaded joints and conical fitting surfaces.
- Periodic Inspection: Inspect threaded connections regularly to guarantee long‑term safe operation of the piping system.
Comply with industrial threaded piping specifications and local safety regulations during installation.
Packaging and Shipping
Every 304 stainless steel male‑female coupling is wrapped with anti‑collision protective film to prevent surface scratches during transit. Moisture‑proof packaging protects the pickled passivated surface. Bulk orders are palletized with export‑standard pallets for convenient handling and container loading.
Our factory is located in Taigu, Shanxi Province. We cooperate with seasoned global logistics networks covering main overseas ports, providing steady and cost‑effective bulk shipment services for industrial piping projects across the world.
Quality Control
1.Raw Material Spectral Composition & Mechanical Test
Every batch of ASTM SS304 stainless steel raw material undergoes full spectral analysis and mechanical property testing, to meet the official technical standards for stainless steel pipe fittings.
2.Hydraulic Sealing Pressure Inspection
Finished 304 stainless steel male‑female couplings are randomly sampled for hydraulic sealing tests under rated working pressure, to confirm zero‑leakage performance of threaded connection surfaces.
3.Thread Dimension Precision Calibration
Special go‑no‑go gauges are used to check thread pitch, thread diameter and tolerance. This guarantees tight matching with standard NPT/BSPT threads and stable sealing after assembly.
4.Full Surface Visual Defect Screening
After pickling and passivation, all products go through 100% manual visual inspection. Workers remove burrs, stains and surface imperfections on threads and outer shells, so the fittings can maintain reliable corrosion resistance during long‑term use.
OEM and Customization Services
We maintain stable annual production capacity and accept bulk OEM & ODM custom orders. Our professional engineering team provides one‑stop customized solutions for various industrial pipeline projects, including customized wall thickness, non‑standard dimensions, laser‑engraved brand logos and dedicated export packaging. We own a complete set of molds covering sizes from 1/2 inch to 4 inches, which can effectively shorten the lead time for sample trial production and mass delivery.
FAQ
Q:Can this 304 stainless steel male‑female coupling be buried underground?
A: Outer anti‑corrosion treatment must be carried out before buried installation. Direct burial without protective measures will greatly shorten the service life of the fitting. We can provide customized anti‑corrosion schemes upon your demand.
Q: What is the standard installation method for this stainless steel male‑female coupling?
A: Clean the thread and sealing surface thoroughly first. Apply suitable thread sealant or PTFE tape, then tighten manually with standard pipe wrenches according to torque requirements. Do not over‑tighten to avoid thread damage, achieving stable long‑term leak‑free connection.
Q: Can it withstand pipeline thermal expansion?
A: The fitting belongs to rigid connecting parts. For long‑distance pipelines with obvious temperature changes, it is suggested to install expansion joints to offset stress caused by thermal deformation.
Q:Is it compatible with different steel pipes?
A:Fits standard NPT / BSPT threaded steel pipes. Please confirm thread specification before ordering.
Q:Why pick 304 stainless steel male‑female couplings rather than carbon steel ones?
A:ASTM 304 stainless steel features outstanding rust and corrosion resistance for water, oil, gas and weak acid media. Standard threaded structure enables easy assembly and disassembly, suitable for piping systems in food processing, water treatment, marine engineering and corrosive medium scenarios.
Contact Us
Searching for reliable 304 stainless steel male‑female couplings to support your industrial piping projects? Our experienced technical team provides full‑process product selection guidance and comprehensive technical support.Email:q1236800000@gmail.com We are able to supply complete official technical datasheets, cost‑effective bulk wholesale quotations and stable delivery schedules. Our high‑grade 304 stainless steel threaded fittings are widely delivered to global projects covering food processing, water treatment, petrochemical industry, shipbuilding and heating pipeline systems.
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