What is the difference between BSPT and NPT in malleable iron pipe fittings?
The difference between BSPT threads and NPT threads:
1. Different usage regions
BSPT is mostly used in Europe and Commonwealth countries and is a British standard. NPT is the American standard pipe thread.
2. Different tooth profile angles
NPT is a 60-degree tapered pipe thread, while BSPT threads are 55-degree sealing tapered pipe threads.
3. Different lead and pitch
For the same nominal size, NPT threads have higher thread height and larger pitch, so their lead is also longer than that of NPST.
Summary:
There are significant differences between NPT threads and BSPT threads in terms of definition and standards
thread angle and taper, sealing performance and connection, dimensions and specifications, as well as compatibility
and applications. Therefore, when selecting and using these two types of threads
it is necessary to consider the specific application scenarios and requirements.