NPT vs BSP Thread
NPT vs BSP Thread Key Points
| Standard | ASME B16.11 & ANSI B16.11 |
|---|---|
| Pressure Class | 2000 PSI to 9000 PSI |
| Threads | ISO, BSP, UNF, NPT, BSPT, SAE |
| Material | Stainless Steel, Nickel Alloy, Carbon Steel, Brass, Duplex and Super Duplex Steel, Copper Alloy |
| Thickness | SCH 20 to SCH 60 |
| Process | CNC Machined |
| Forging | Open Die Forging |
| Approvals | ADNOC, Q CHEM, EIL, MA’ADEN, KNPC, BAPCO, SABIC, KOC, Saudi Aramco, KPI |
| Origin of Raw Material: | European, Indian, Korean, Janpanese, UK, German |
| MTC | EN 10204/3.1B |
| Test Certificates |
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| RFQ: | support@pipingmaterial.ae |
| Shipping Time |
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| Value Added Services | Forging, Casting, Polish, Sand Blasting, Electroplating, Galvanizing |
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NPT Thread Full form is National Pipe Tapered Thread, whereas BSP Stands for British Standard Pipe Thread
NPT vs BSP Thread Specification
International Standard: ANSI B16.11, ASME B16.11
Surface Finish: Polished, Anti-rust Oil
Installations: Oil & Gas, Power Generation, Petrochemicals
Standard Testing: Hydrostatic, Hardness, Proof & Impact Testing
Packaging: Plastic Bag, Wooden Case & Carton Box
Connection: Socket Welding & Threaded
Threads : ISO, BSP, UNF, NPT, BSPT, SAE
Forging Method: Open Die & Closed Die Forging
| Size | Threads per inch | Pitch | Major Diameter | Minor Diameter | Gage Length | ||||
|---|---|---|---|---|---|---|---|---|---|
| Inch | mm | Inch | mm | Inch | mm | Inch | mm | ||
| 1/8 | 28 | 0.0357 | 0.907 | 0.383 | 9.728 | 0.3372 | 8.565 | 0.1563 | 3.97 |
| 1/4 | 19 | 0.0526 | 1.337 | 0.518 | 13.157 | 0.4506 | 11.445 | 0.2367 | 6.012 |
| 3/8 | 19 | 0.0526 | 1.337 | 0.656 | 16.662 | 0.5886 | 14.95 | 0.25 | 6.35 |
| 1/2 | 14 | 0.0714 | 1.814 | 0.825 | 20.955 | 0.7336 | 18.633 | 0.3214 | 8.164 |
| 3/4 | 14 | 0.0714 | 1.814 | 1.041 | 26.441 | 0.9496 | 24.12 | 0.375 | 9.525 |
| 1 | 11 | 0.0909 | 2.309 | 1.309 | 33.249 | 1.1926 | 30.291 | 0.4091 | 10.391 |
| 1 ¼ | 11 | 0.0909 | 2.309 | 1.65 | 41.91 | 1.5336 | 38.953 | 0.5 | 12.7 |
| 1 ½ | 11 | 0.0909 | 2.309 | 1.882 | 47.803 | 1.7656 | 44.846 | 0.5 | 12.7 |
| 2 | 11 | 0.0909 | 2.309 | 2.347 | 59.614 | 2.2306 | 56.657 | 0.625 | 15.875 |
| 2 ½ | 11 | 0.0909 | 2.309 | 2.96 | 75.184 | 2.8436 | 72.227 | 0.6875 | 17.463 |
| 3 | 11 | 0.0909 | 2.309 | 3.46 | 87.884 | 3.3436 | 84.927 | 0.8125 | 20.638 |
| 4 | 11 | 0.0909 | 2.309 | 4.45 | 113.03 | 4.3336 | 110.073 | ||
| Size | Threads per inch | Pitch | Major Diameter (O.D) | ||
|---|---|---|---|---|---|
| Inch | mm | Inch | mm | ||
| 1/8 | 27 | 0.03704 | 0.94082 | 0.405 | 10.29 |
| 1/4 | 18 | 0.05556 | 1.41122 | 0.54 | 13.72 |
| 3/8 | 18 | 0.05556 | 1.41122 | 0.675 | 17.15 |
| 1/2 | 14 | 0.07143 | 1.81432 | 0.84 | 21.34 |
| 3/4 | 14 | 0.07143 | 1.81432 | 1.05 | 26.67 |
| 1 | 11 ½ | 0.08696 | 2.20878 | 1.315 | 33.4 |
| 1 ¼ | 11 ½ | 0.08696 | 2.20878 | 1.66 | 42.16 |
| 1 ½ | 11 ½ | 0.08696 | 2.20878 | 1.9 | 48.26 |
| 2 | 11 ½ | 0.08696 | 2.20878 | 2.375 | 60.33 |
| 2 ½ | 8 | 0.125 | 3.175 | 2.875 | 73.03 |
| 3 | 8 | 0.125 | 3.175 | 3.5 | 88.9 |
| 4 | 8 | 0.125 | 3.175 | 4.5 | 114.3 |
Check Number of Threads per inch in NPT
| Size | Pitch (Threads per Inch) | |
|---|---|---|
| NPT/NPS | BSP | |
| 1/8 | 27 | 28 |
| 1/4 | 18 | 19 |
| 3/8 | 18 | 19 |
| 1/2 | 14 | 14 |
| 3/4 | 14 | 14 |
| 1 | 11 ½ | 11 |
| 1 ¼ | 11 ½ | 11 |
| 1 ½ | 11 ½ | 11 |
| 2 | 11 ½ | 11 |
| 2 ½ | 8 | 11 |
| 3 | 8 | 11 |
| 3 ½ | 8 | 11 |
| 4 | 8 | 11 |
| 5 | 8 | 11 |
| 6 | 8 | 11 |
Best Practices When Choosing Between NPT vs BSP
- Verify the sealing method
- Match thread standards intentionally
- Use adapters when needed
- Avoid forcing mismatched threads
- Confirm thread type on piping and valves
See Where You Can Find Material Ex Stock
| Asia | Brunei, Cambodia, Laos, Malaysia, Mongolia, Myanmar, Philippines, Singapore, Taiwan, Thailand, Vietnam, Indonesia |
|---|---|
| Europe | Andorra, Armenia, Azerbaijan, Belgium, France, Georgia, Germany, Netherlands, Italy |
| Middle East | Abu Dhabi, Ajman, Al Khobar, Al Jubail, Amman, Beirut, Dammam, Doha, Dubai, Fujairah, Iraq, Jeddah, Jebel Ali, Jordan, Lebanon, Lusail, Manama, Muscat, Ras Al Khaimah, Riyadh, Saudi Arabia, SCZone, Sharjah, Sohar, Syria, Turkey, Umm Al Quwain, Yemen |
NPTF Thread is a Dryseal Tapered Pipe Thread and Creates Leakproof seals without the use of a Sealant, know moe about NPT Tapered
Dryseal Tapered Pipe Thread Applications
- Hydraulic Systems
- Fuel and Oil Lines
- Pneumatic Systems
- Refrigeration
- Water supply systems
- Natural gas pipelines
Warehouse Locations of Partner Suppliers
| Africa | Abuja, Addis Ababa, Benin, Cameroon, Cape Town, Chad, Congo, Durban, Equatorial Guinea, Gabon, Ghana, Ivory Coast, Johannesburg, Kenya, Lagos, Nairobi, Niger, Nigeria, Ogun, Republic of the Congo, Rwanda, South Africa, Sudan, Togo, West Africa |
|---|---|
| GCC Countries | Kuwait, United Arab Emirates (UAE), Bahrain, Qatar, Saudi Arabia, Oman |
| MENA | Algeria, Cairo, Casablanca, Egypt, Libya, Morocco, Tunisia |
BSP Male/ Female Threads are the Standard Design for Most of the world’s Tapered Threads
Best Practices for Working with NPT and BSP Threads
- Proper Installation Techniques
- Regular Inspections and Maintenance
- Training and Education
Sales Agents in Following Locations
| Country | Cities |
|---|---|
| Belgium | Haarlem, Amsterdam, Eindhoven, The Hague, Rotterdam |
| Netherlands | Leuven, Antwerp, Seraing, Brussels, Ghent, Meeuwen-Gruitrode, Westerlo |
NPT and BSP Threads are not Interchangeable due to the Differences in Thread Forms
BSP & NPT Thread Compatibility Chart
| Size | BSP | NPT |
|---|---|---|
| 1/8” | 28 | 27 |
| 1/4” | 19 | 18 |
| 3/8” | 14 | 18 |
| 1/2” | 14 | 14 |
| 3/4” | 11 | 14 |
| 1” | 11 | 11 1/2” |
| 1 1/4” | 11 | 11 1/2” |
| 1 1/2” | 11 | 11 1/2” |
| 2” | 11 | 11 1/2” |
| 2 1/2” | 11 | 8 |
| 3” | 11 | 8 |
| 4” | 11 | 8 |
| Properties | BSP (BSPT / BSPP) | NPT (National Pipe Thread) |
|---|---|---|
| Governing Standard | ISO 7/1 (BSPT), ISO 228 (BSPP) | ASME B1.20.1 |
| Thread Angle | 55° | 60° |
| Crest & Root Shape | Rounded | Flattened |
| Seal Mechanism | BSPT seals on threads, BSPP requires gasket/O-ring | Seals on threads + sealant (PTFE tape) |
Why Pipe Threads Matter in Piping Systems
- Leaks under pressure
- Damage to fittings
- System downtime
- Failed inspections
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