NPT Black Round Face Reducing Coupling Pipe Fittings
2.Size-adapting threaded pipe joiner, industrial use .
3.Water/gas pipeline reducing connection fitting .
4.Black malleable iron, precision-threaded reducer .
5.High-strength, corrosion-resistant reducing coupling .
6.NPT/BSPT compatible round-edge reducer .
7.Industrial-grade reducing black malleable joiner .
8.Durable round-edge size-transition coupling
Description
NPT Black Round Face Reducing Coupling Pipe Fittings
When your piping system requires a reliable connection between different pipe diameters, NPT Black Round Face Reducing Coupling Pipe Fittings give the idealize arrangement. These specialized flexible press components are built to connect two channels of diverse ostensible breadths in a straight line. You can believe these fittings to encourage smooth bore measure moves whereas keeping up ideal stream characteristics. Our decreasing couplings highlight accuracy NPT threading and a particular circular confront plan that guarantees predominant auxiliary judgment beneath high-torque applications.
Manufactured from high-grade ASTM A197 flexible press, these fittings provide extraordinary strength and execution. The dark oxide coating gives amazing erosion resistance amid capacity and transport. Whether you're working on mechanical steam frameworks or gas dissemination systems, these couplings offer the unwavering quality your venture demands.
Technical Specifications
Our decreasing couplings are built to meet the most requesting mechanical necessities. The moldable press development gives a pliable quality of roughly 40,000 psi with 5% stretching. This combination guarantees the ductility required to avoid delicate break beneath warm expansion.
The NPT threading highlights a exact 60-degree flank point and 1° 47' decrease relative to the hub. This plan makes the metal-to-metal smash seal basic for high-pressure applications. You can depend on these details for reliable, leak-resistant connections.
Key Features
- Superior Fabric: ASTM A197 flexible press construction
- Round Confront Plan: Strengthened ring gives upgraded auxiliary integrity
- Precise Threading: NPT decrease strings guarantee tight, leak-resistant seals
- Corrosion Assurance: Dark oxide coating avoids climatic oxidation
- High Quality: 40,000 psi pliable quality with amazing ductility
- Temperature Safe: Withstands warm cycling without cracking
- Vibration Damping: Predominant stun resistance compared to cast iron
Dimensions and Specifications Table
| Size Combination | Length (inches) | Weight (lbs) | Thread Type | Pressure Rating |
|---|---|---|---|---|
| 1" x 3/4" | 2.12 | 0.45 | NPT | Class 150 |
| 1¼" x 1" | 2.38 | 0.68 | NPT | Class 150 |
| 1½" x 1" | 2.62 | 0.85 | NPT | Class 150 |
| 1½" x 1¼" | 2.62 | 0.82 | NPT | Class 150 |
| 2" x 1½" | 3.12 | 1.25 | NPT | Class 150 |
| 2" x 1¼" | 3.12 | 1.28 | NPT | Class 150 |
| 2½" x 2" | 3.62 | 1.85 | NPT | Class 150 |
| 3" x 2½" | 4.25 | 2.45 | NPT | Class 150 |



Materials and Surface Treatment
These fittings are fabricated from premium pliable press acclimating to ASTM A197 benchmarks. The flexible press microstructure highlights a ferritic lattice with nodular graphite. This composition gives remarkable stun resistance and vibration damping properties.
The dark oxide surface treatment serves numerous purposes. It gives erosion resistance amid capacity and transport. The coating moreover recognizes these fittings from galvanized forms, guaranteeing appropriate choice for your particular application.






Standards and Certifications
Our NPT Black Round Face Reducing Coupling Pipe Fittings conform to multiple industry standards:
- ASME B16.3 for Malleable Iron Threaded Fittings
- ASTM A197 for material composition
- ASME B1.20.1 for NPT thread specifications
- ISO 9001 quality management system compliance
These certifications guarantee you get items that meet universal quality and security requirements.
Application Areas
These versatile fittings serve critical functions across multiple industries:
Gas Conveyance Frameworks: Fundamental for normal gas and propane dissemination where the dark wrap up anticipates zinc defilement. The NPT strings give gas-tight seals required for security compliance.
Steam Warming Frameworks: Culminate for evaporator rooms and steam warming systems. The flexible press development withstands warm cycling without splitting. You can utilize these fittings to interface diverse pipe sizes in retrofitted HVAC systems.
Industrial Applications: Perfect for petrochemical and pressure driven oil lines where welded joints aren't viable. These fittings stand up to vibration close pumping stations whereas keeping up seal integrity.






Installation Instructions
Proper establishment guarantees ideal execution. Clean all strings completely some time recently gathering. Apply fitting string sealant or tape concurring to your application prerequisites. Hand-tighten to begin with, at that point utilize pipe torques for last tightening.
The circular confront plan permits for higher torque values without bell-mouthing. In any case, maintain a strategic distance from over-tightening which can harm the strings. Back both channels amid establishment to avoid stretch concentration.
Packaging and Shipping
We bundle each fitting with defensive caps to anticipate string harm amid transport. Our standard bundling incorporates moisture-resistant materials to keep up the dark oxide coating integrity.
Shipping alternatives incorporate standard cargo for bulk orders and assisted conveyance for pressing necessities. Contact us for particular bundling necessities or custom shipping arrangements.





Quality Control
Our comprehensive quality control framework guarantees each fitting meets details. We conduct weight testing, dimensional confirmation, and fabric composition examination. Each clump experiences threading gage review to ensure appropriate NPT compliance.
Our ISO 9001 certified quality administration framework gives traceability from crude materials through last review. You get steady, dependable items with each order.






OEM and Customization Services
Shanxi Taigu Zhiyuan offers broad customization capabilities. Our 26 a long time of encounter in casting and pipe fitting fabricating empowers us to meet your particular necessities. We can adjust measurements, materials, or surface medicines based on your application needs.
Our yearly generation capacity of 30,000 tons bolsters both standard and custom orders. With over 1,000 item details accessible, we likely have the correct fittings you need.






Frequently Asked Questions
Q: What's the difference between round face and square face designs?
A: Round face fittings feature a reinforced ring at thread openings, while square face designs have heavier wall thickness. Both provide enhanced structural integrity.
Q: Can these fittings be used for potable water?
A: The black oxide coating isn't intended for potable water applications. Consider our galvanized options for water service.
Q: What pressure ratings are available?
A: Standard Class 150 fittings are rated for 300 psi at temperatures from -20°F to 150°F, and 150 psi at 360°F.
Contact Us
Ready to discuss your pipe fitting requirements? Our technical team is here to help you select the right products for your application. We provide expert guidance based on decades of manufacturing experience.
For quotes, technical specifications, or custom requirements, contact us at zhiyuan@mifittings.com. We respond promptly to all inquiries and provide detailed product information to support your project success.
Trust Shanxi Taigu Zhiyuan for reliable, high-quality NPT Black Round Face Reducing Coupling Pipe Fittings that meet your most demanding applications.
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