NPT Black Round Face Coupling Pipe Fittings
2.Threaded pipe joiner, industrial connection .
3.Water/gas industrial pipeline coupling .
4.Black malleable iron, precision-threaded .
5.High-strength, corrosion-resistant coupling .
6.NPT/BSPT compatible round-edge fitting .
7.Industrial-grade black malleable joiner .
8.Durable round-edge threaded pipe coupling
Description
NPT Black Round Face Coupling Pipe Fittings
When you need reliable pipe connections for your industrial applications, NPT Black Round Face Coupling Pipe Fittings convey remarkable execution and toughness. These basic mechanical components are planned to interface two lengths of channeling with the same distance across in a straight line. They utilize National Pipe Taper (NPT) strings to guarantee a leak-resistant seal. Made from high-quality dark flexible press, these fittings highlight a round and hollow circular confront outside profile. This plan permits for simple engagement with pipe torques, making establishment direct and effective for your projects.
Our fittings address key industry challenges counting string rankling amid high-torque gathering and basic disappointment beneath vibration. The dark wrap up gives prevalent execution in gas lines, petroleum frameworks, and steam warming applications where zinc chipping might harm downstream equipment.
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Technical Specifications
Material Composition: ASTM A197 Cupola Malleable Iron
- Minimum Tensile Strength: 40,000 psi (276 MPa)
- Yield Strength: 30,000 psi (207 MPa)
- Carbon Content: 2.00-3.00%
- Silicon Content: 1.00-1.80%
- Elongation Requirement: 5%
Thread Standards: Precision-machined NPT threads
- Flank Angle: 60 degrees
- Taper: 1°47' (3/4 inch per foot)
- Conforms to ANSI/ASME B1.20.1 standards






Pressure Ratings:
- Class 150: 300 psi at -20°F to 150°F
- Steam Service: 150 psi at 366°F
- Class 300: Heavy-duty applications available
Key Features
- Superior Quality: Moldable press development gives remarkable stun resistance and vibration damping
- Leak-Tight Fixing: NPT decrease strings make dynamic fixing for liquid and gas transport
- Round Confront Plan: Uniform divider thickness conveyance anticipates push concentrators
- Corrosion Security: Dark oxide coating gives fundamental dampness resistance
- Easy Establishment: Circular confront profile outlined for pipe torque engagement
- Thermal Resistance: Withstands recurrent warm development and contraction
Dimensions and Specifications Table
| Size (NPT) | Length (L) | Outer Diameter | Thread Length | Weight (lbs) |
|---|---|---|---|---|
| 1/8" | 1.0" | 0.54" | 0.40" | 0.03 |
| 1/4" | 1.12" | 0.68" | 0.40" | 0.05 |
| 3/8" | 1.25" | 0.81" | 0.43" | 0.08 |
| 1/2" | 1.38" | 0.98" | 0.50" | 0.13 |
| 3/4" | 1.50" | 1.19" | 0.53" | 0.19 |
| 1" | 1.75" | 1.50" | 0.68" | 0.32 |
| 1-1/4" | 2.00" | 1.88" | 0.71" | 0.50 |
| 1-1/2" | 2.12" | 2.17" | 0.71" | 0.68 |
| 2" | 2.38" | 2.76" | 0.75" | 1.10 |






Materials and Surface Treatment
Your fittings are made from ASTM A197 flexible press, including a ferritic lattice with nodular graphite structure. This composition conveys extraordinary stun resistance compared to standard gray cast press. The dark oxide surface treatment gives rust-preventative assurance amid capacity and transport.
The coating is particularly built for non-potable water applications, making it perfect for gas lines and petroleum frameworks where galvanized materials seem present undesirable metallic impurities.
Standards and Certifications
- ASTM A197 - Malleable Iron Material Standards
- ASME B16.3 - Malleable Iron Threaded Fittings
- ANSI/ASME B1.20.1 - NPT Thread Standards
- ISO 9001 Quality Management System






Application Areas
Industrial Steam and Hydronic Heating Systems: Idealize for low-pressure steam lines up to 150 psi. The circular confront plan handles warm cycling way better than inflexible alternatives.
Natural Gas and Propane Dispersion: Fundamental for private and commercial gas channeling systems. Dark press anticipates chipping issues that might clog pilot lights and security equipment.
Fire Concealment Frameworks: Perfect for dry-pipe frameworks in fabricating offices with tall vibration situations. The ductile quality gives resistance against water pound effects.
Water and Oil Transport: Reasonable for WOG (Water, Oil, Gas) benefit in mechanical pipeline frameworks requiring dependable connections.
Installation Instructions
- Clean all thread surfaces thoroughly
- Apply appropriate pipe thread sealant
- Hand-tighten the NPT Black Round Face Coupling Pipe Fittings into position
- Use pipe wrenches to complete installation
- Tighten until hand-tight plus 2-3 additional turns
- Avoid over-tightening to prevent thread damage
Packaging and Shipping
Your orders are carefully bundled to anticipate harm amid transport. We utilize defensive materials and appropriate labeling for simple distinguishing proof. Standard shipping choices include:
- Bulk bundling for huge orders
- Individual defensive wrapping for littler quantities
- Custom bundling arrangements available





Quality Control
Every fitting experiences thorough review taking after ISO 9001 quality guidelines. Our testing incorporates dimensional confirmation, weight testing, and fabric composition examination. With over 26 a long time of fabricating involvement, we guarantee reliable quality in each product.
OEM and Customization Services
We offer comprehensive customization services including:
- Custom sizing and specifications
- Modified pressure ratings
- Special surface treatments
- Private labeling options
- Technical consultation for specific applications






Frequently Asked Questions
Q: What's the difference between round face and square face couplings?
A: Round face couplings provide uniform wall thickness and are designed for pipe wrench installation, while square face versions offer thicker walls at thread entry points.
Q: Can these fittings be used for potable water?
A: The black coating makes them unsuitable for potable water. Consider galvanized options for drinking water applications.
Q: What's the maximum operating temperature?
A: Class 150 fittings handle up to 366°F for steam service and 150°F for general WOG applications.
Contact Us
Ready to enhance your piping systems with reliable NPT Black Round Face Coupling Pipe Fittings? Our technical team is here to help you select the right specifications for your application.
Email: zhiyuan@mifittings.com
Contact us today for competitive pricing, technical support, and custom solutions tailored to your specific requirements. With our extensive inventory and fast shipping, you'll have the quality fittings you need when you need them.
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