NPT Black Union 340 Pipe Fittings
2.Detachable pipe joint, easy maintenance .
3.Industrial water/gas pipeline fitting .
4.Precision-threaded black malleable iron .
5.High-strength, corrosion-resistant 340 union .
6.NPT/BSPT compatible 340 pipe union .
7.Industrial-grade 340 black malleable fitting .
8.Durable threaded 340 union connector
Description
NPT Black Union 340 Pipe Fittings - Professional Industrial Pipe Connectors
Looking for reliable pipe connections that can handle industrial demands? NPT Black Union 340 Pipe Fittings are your solution. These specialized three-piece separable connectors are made from high-grade moldable press to meet the thorough prerequisites of mechanical channeling frameworks. The 340 assignment highlights a precision-machined iron-to-iron cone shaped situate with National Pipe Taper threads. Not at all like settled joints, these fittings permit you to collect and dismantle channeling segments without cutting channels or pivoting gear. This spares you time and decreases upkeep costs significantly.
Our fittings unravel basic mechanical challenges. You get prevalent metal-to-metal fixing that withstands warm development way better than gasketed options. This makes them idealize for steam, gas, and oil applications where elastic seal corruption postures risks.



Technical Specifications
The fittings are designed with accuracy to convey uncommon execution in requesting environments:
- Material: ASTM A197 Malleable Iron
- Thread Standard: NPT per ANSI/ASME B1.20.1
- Dimensional Standard: ASME B16.3
- Pressure Rating: Class 150 (300 PSI Max WOG)
- Temperature Range: -20°F to 350°F
- Tensile Strength: Minimum 300 MPa (43,500 PSI)
- Elongation: 5-10% for shock resistance
- Seat Type: Iron-to-iron conical design






Key Features
Reusable Association: You can dismantle and reassemble these fittings numerous times without losing seal astuteness. This include alone can spare thousands in support costs.
Superior Fixing: The funnel shaped situate plan makes a self-aligning, leak-proof metal-to-metal seal that makes strides as you fix the union nut.
Vibration Resistance: The mechanical locking constrain combined with decreased strings gives fabulous resistance to framework vibration.
Thermal Soundness: Dark moldable press keeps up basic judgment in high-heat applications superior than elective materials.
Easy Establishment: Three-piece plan permits association without pipe turn, streamlining your establishment process.
Dimensions and Specifications Table
| Size (NPT) | A (Length) | B (Width) | C (Height) | Weight (lbs) | Working Pressure |
|---|---|---|---|---|---|
| 1/8" | 1.25" | 0.75" | 0.75" | 0.12 | 300 PSI |
| 1/4" | 1.50" | 0.88" | 0.88" | 0.18 | 300 PSI |
| 3/8" | 1.75" | 1.00" | 1.00" | 0.25 | 300 PSI |
| 1/2" | 2.00" | 1.25" | 1.25" | 0.35 | 300 PSI |
| 3/4" | 2.25" | 1.50" | 1.50" | 0.55 | 300 PSI |
| 1" | 2.75" | 1.75" | 1.75" | 0.85 | 300 PSI |
Materials and Surface Treatment
We make our fittings from ASTM A197 flexible press. This fabric offers predominant ductility compared to cast press. The dark oxide coating gives fabulous rust anticipation whereas keeping up cost-effectiveness for indoor applications.
The moldable press development gives you the quality of steel with way better stun resistance. This avoids breaking beneath unforeseen framework vibration or warm shock.






Standards and Certifications
Our NPT Black Union 340 Pipe Fittings comply with industry standards:
- ASME B16.39 for union specifications
- ASTM A197 for material properties
- ASME B1.20.1 for NPT threading
- ISO9001 quality management system






Application Areas
These flexible fittings serve numerous industries:
Industrial Steam Frameworks: Idealize for evaporator associations and steam dispersion networks.
Gas Dispersion: Solid execution in normal gas and propane systems.
Oil and Petroleum: Chemical resistance makes them suitable for petroleum applications.
Water Treatment: Solid development handles water treatment office demands.
Manufacturing Plants: Basic for prepare channeling in fabricating environments.
HVAC Frameworks: Perfect for warming and cooling framework connections.
Installation Instructions
Installation is straightforward with proper preparation:
- Clean Strings: Evacuate any flotsam and jetsam from both male and female threads
- Apply Sealant: Utilize suitable string sealant or tape on male threads
- Hand Fix: String components together by hand first
- Final Fixing: Utilize suitable torques to accomplish legitimate torque
- Pressure Test: Continuously test framework some time recently full operation
Remember to bolster channels amid establishment to anticipate push on the fitting.





Packaging and Shipping
We ensure your venture with cautious bundling. Each fitting gets person assurance to anticipate string harm amid shipping. Bulk orders come in strong cartons with froth inserts.
Standard shipping choices incorporate ground cargo for household orders. Worldwide shipping accessible with legitimate documentation. Lead times ordinarily extend from 2-4 weeks depending on amount and customization requirements.
Quality Control
Quality drives everything we do. Our ISO9001 certified office keeps up strict quality control all through generation. Each bunch experiences weight testing and dimensional verification.
We review string quality utilizing accuracy gages. Fabric composition testing guarantees ASTM compliance. Visual assessment catches any surface absconds some time recently packaging.
OEM and Customization Services
Need particular alterations? We offer comprehensive customization administrations. Our building group can adjust measurements, materials, or coatings to meet your correct requirements.
With 18 a long time of fabricating involvement, we get it one of a kind application needs. Custom checking, uncommon bundling, and altered weight appraisals are all possible.






Frequently Asked Questions
Q: What's the difference between 340 and 342 unions?
A: The 340 features iron-to-iron conical seats, while 342 unions have brass seat inserts.
Q: Can I use these fittings outdoors?
A: For outdoor use, consider our galvanized versions for better corrosion resistance.
Q: What's the maximum operating temperature?
A: These fittings handle temperatures up to 350°F in standard applications.
Q: How many times can I reuse these unions?
A: With proper care, you can disassemble and reassemble them dozens of times.
Contact Us
Ready to discuss your pipe fitting needs? Our technical team stands ready to help you select the right NPT Black Union 340 Pipe Fittings for your application.
Contact us today at zhiyuan@mifittings.com for quotes, technical support, or customization discussions. We're committed to providing solutions that keep your operations running smoothly.
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