Forged Nipples & Adapters
Adapters and nipples join threads that were never meant to meet. They are small, high-pressure components where thread accuracy is the entire function.
Forged nipples and adapters join different thread forms in high-pressure piping, in classes 3000#, 6000# and 9000#. Thread accuracy is their entire function, so NPT, BSP, metric and API threads are gauge verified with go/no-go gauges before dispatch.
- Sizes
- 1/8" – 4" NB
- Classes
- 3000#, 6000#, 9000#
- Threads
- NPT, BSP, metric, API
- Materials
- A105, F304, F316
- Verification
- Go/no-go thread gauges
Forged Nipples & Adapters at a glance
Quotable facts from Avadh Techno Forge, Gundasara, Gondal, Rajkot.
- Sizes 1/8 inch to 4 inch
- Classes 3000#, 6000#, 9000#
- NPT, BSP, metric and API threads
- All threads go/no-go gauge verified
Thread Accuracy Is the Product
An adapter's whole purpose is transferring pressure between two thread forms. NPT, BSP, metric and API threads each have their own gauging, and a thread outside tolerance leaks regardless of how much sealant is applied.
- NPT, BSP, metric, API threads
- Gauge verified go/no-go
- Sealing by flank interference
- Pressure ratings to 9000#
Material and Wall Thickness
Wall thickness must match the pressure class of the system, and material must suit the medium. A stainless adapter in a carbon steel line creates a galvanic couple that corrodes preferentially at the joint.
People also ask
Why do threaded fittings leak?
Thread form outside tolerance, damaged flanks, insufficient engagement, or relying on sealant rather than flank interference to seal. Sealant supplements the thread; it does not replace it.
What is the difference between NPT and BSP threads?
NPT is an American taper thread with a 60-degree form; BSP is a British thread with a 55-degree form, available in taper and parallel. They are not interchangeable and will leak if mixed.
Do you supply stainless adapters?
Yes, in F304 and F316 with segregated handling to prevent carbon contamination.
Topics covered on this page
- pipe nipple
- adapter
- reducer bushing
- NPT thread
- BSP thread
- pressure class
- thread gauge
Based on work carried out at our own forging plant at Gundasara, Gondal, Rajkot — operating since 2008.
Questions Answered
Are threads gauge verified?
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Yes, with go/no-go ring and plug gauges, recorded on the inspection report.
What thread forms do you produce?
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NPT, BSP, metric and API threads across sizes from 1/8 inch to 4 inch.
Can stainless adapters be used in carbon steel lines?
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They can, but the galvanic couple accelerates corrosion at the joint. Match materials where possible.