The ASME B16.11 Stainless Steel Square Head Pipe Plug is a high-pressure forged threaded pipe fitting designed to seal the end of female threaded pipe connections in industrial piping systems.
This threaded square head pipe plug is widely used in oil & gas pipelines, petrochemical plants, instrumentation tubing systems and high-pressure hydraulic lines, providing reliable sealing performance and long service life.
Manufactured from precision forged stainless steel, our square head threaded plugs ensure excellent corrosion resistance, strong mechanical strength and leak-free performance under severe working conditions.
✔ Forged stainless steel construction
✔ High-pressure threaded pipe sealing solution
✔ Strong square head for easy installation
✔ Suitable for NPT / BSPT / BSPP threaded systems
Our stainless steel square head pipe plugs are available in:
Size Range: 1/8" – 4" (DN6 – DN100)
Pressure Rating: Class 2000 / 3000 / 6000 / 9000
Thread Type: NPT / BSPT / BSPP
Standard: ASME B16.11 / BS 3799
Designed for small bore high-pressure threaded piping systems in energy and industrial projects.
This ASME B16.11 threaded square head plug is manufactured in compliance with:
ASME B16.11 Forged Fittings Standard
BS 3799 Threaded Pipe Fittings
ASME B1.20.1 NPT Thread
ISO 7-1 BSPT Thread
ISO 228 BSPP Thread
Ensuring full compatibility with global industrial pipeline systems.
We supply forged stainless steel threaded pipe plugs in multiple grades:
ASTM A182 F304 / F304L
ASTM A182 F316 / F316L
ASTM A182 F321 / F347
Duplex & Super Duplex F51 / F53 / F55
Nickel Alloy Inconel 625
Monel 400
Hastelloy C276
All square head pipe plugs are supplied with EN 10204 3.1 MTC and full traceability.
Raw material verification
Closed die forging
Heat treatment (if required)
CNC precision thread machining
Pickling & passivation
Dimensional inspection & NDT
Forged structure ensures high strength threaded pipe plug performance in critical piping applications.
Every stainless steel square head plug undergoes strict inspection:
Thread gauge inspection
Dimensional verification
PMI testing
Surface quality check
Optional UT / MT
Ensuring compliance with ASME B16.11 high-pressure piping requirements.
This high-pressure threaded square head pipe plug is widely used in:
Oil & gas pipeline systems
Petrochemical & refinery piping
Instrumentation tubing systems
Hydraulic high-pressure lines
Chemical processing plants
Used to seal unused threaded outlets or pipe ends safely and reliably.
Forged high-strength pipe plug design
Precision machined NPT / BSP threads
Excellent corrosion resistance
Multiple pressure classes available
Stable export supply for EPC projects
Fast quotation and global delivery
👉 Send your threaded fitting list or technical drawings for quick quotation.
A stainless steel square head pipe plug is used to seal the end of female threaded pipe fittings or unused outlets in piping systems.
It is widely applied in oil & gas pipelines, petrochemical plants, instrumentation tubing and hydraulic high-pressure systems.
Our forged threaded square head pipe plugs are available in Class 2000, Class 3000, Class 6000 and Class 9000 pressure ratings, making them suitable for high-pressure industrial piping applications.
We manufacture stainless steel square head pipe plugs with:
NPT Thread (ASME B1.20.1)
BSPT Thread (ISO 7-1)
BSPP Thread (ISO 228)
Custom thread types can also be produced according to project specifications.
Standard materials include:
Stainless Steel ASTM A182 F304 / F304L / F316 / F316L
High temperature grades F321 / F347
Optional materials:
Duplex & Super Duplex F51 / F53 / F55
Nickel Alloys such as Inconel 625, Monel 400, Hastelloy C276
All high-pressure square head threaded pipe plugs are produced from forged raw materials with CNC precision machining, ensuring superior strength, accurate threads and long service life in demanding environments.
Yes. All stainless steel pipe plugs are supplied with EN 10204 3.1 MTC.
Third-party inspection such as SGS, BV or TUV can be arranged upon request.
These forged threaded pipe plugs are widely used in:
Oil & gas transmission pipelines
Petrochemical & refinery plants
Instrumentation tubing systems
Hydraulic power units
Chemical processing facilities
Yes. As a professional threaded pipe fitting manufacturer, we can supply customized sizes, materials, pressure classes and thread standards based on project drawings or technical specifications.
Simply send us your pipe fitting list, quantity or technical drawing, and our sales team will provide a fast and competitive quotation within 24 hours.
