Hebei Shunlinfeng Pipeline Manufacturing Co., Ltd.
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Tel/WhatsApp: +8613315790503
Email: admin@shunlinfeng.com
Address: Yanshan County, Cangzhou, Hebei Province, China
High-Pressure Hex Head Plug
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Product Detail
Standard
Product introduction
Square Head Plug Technical Overview
A Square Head Plug is a threaded pipe fitting designed to seal pipe openings or fittings securely. Recognized by its square-shaped head, this plug type allows for easy installation and removal using standard wrenches or adjustable spanners, making it ideal for applications requiring robust sealing in low-to-medium pressure systems.
Key Features & Design
The plug features tapered pipe threads (typically NPT or BSPT), which create a mechanical seal when tightened. The square head provides superior grip for torque application, ensuring a tight seal even in high-vibration environments. Unlike hex head plugs, the square design offers better resistance to rounding off under heavy torque, making it suitable for rugged industrial applications.
Materials & Applications
Common materials include:
Carbon Steel (ASTM A105) – Used in oil, gas, and general industrial piping.
Stainless Steel (ASTM A182 F304/316) – Preferred for corrosive or high-purity systems.
Brass/Bronze – Ideal for water, steam, and low-pressure gas lines.
PVC/CPVC – Used in chemical and drainage systems.
Square head plugs are widely used in:
Plumbing & HVAC systems – For sealing test ports or unused connections.
Industrial piping – In hydraulic, pneumatic, and process lines.
Marine & offshore applications – Due to their corrosion-resistant variants.
Installation & Sealing
Thread Preparation – Clean male threads and apply PTFE tape or thread sealant.
Hand-Tightening – Ensure proper initial engagement to avoid cross-threading.
Final Torque – Use a wrench to tighten 1-1.5 turns past hand-tight (for NPT threads).
Inspection – Verify the plug is seated securely without over-torquing.
Advantages Over Other Plug Types
✔ Better Grip – The square head resists slipping under high torque.
✔ Durability – Less prone to rounding off compared to hex heads in heavy-duty use.
✔ Simple Tool Compatibility – Can be installed using basic wrenches or even a pipe wrench in emergencies.
Limitations
✗ Not for High-Pressure – Typically limited to Class 150-600 applications.
✗ Thread Wear Risk – Repeated disassembly may degrade threads over time.
✗ Sealant Required – Needs PTFE tape or pipe dope for leak-proof sealing.
Standards & Quality Assurance
ASME B16.11 – Standard for forged threaded fittings.
ASTM A105/A182 – Material specifications.
NACE MR0175 – Compliance for sour service (if applicable).
Why Choose a Square Head Plug?
Reliable sealing in low-to-medium pressure systems.
Easy maintenance – Can be removed and reinstalled multiple times.
Cost-effective – Simple design with long service life.
For high-pressure or critical applications, consider socket weld or hex head plugs for better sealing performance.
Factory
Product packaging
We can provide wooden box packaging, pallet packaging, carton box packaging, and we can accept customized packaging.
FAQ
Q:Can I Get A Sample For Testing?
A:Yes, We Can Provide Free Samples, But You Need To Pay For The Shipping Cost.
Q:Is It Safe On The Payment For Me As We Are The First Cooperation?
A:We Can Do The Trade Assurance On Alibaba, Which Will Guarantee Your Payment Safety, We Also Accept Other Safe Payment Way As You Want.
Q:Do You Accept Product Customization?
A:Yes, We Can Accept Material Customization, Specification Model Customization, Drawing Customization, Packaging Customization.
Q:Can I Put Our Logo On The Product?
A:Yes, We Can Provide You With Laser Engraving Logo And Sticker Logo For Free.
Q:What Is The Moq?
A:For Trial Order, We Can Sell Even One Piece
Q:How Long Is The Product Warranty Period?
A:One Year, If The Product Is Non-Artificially Damaged During The Warranty Period, We Can Provide You With A New Product For Free.
Q:How Long Is The Delivery Time?
A:If We Have Stock, We Will Ship Within 2 Days, If There Is No Stock, We Will Ship Within 5-7 Days.
Q:Do You Accept Oem/Odm Service?
A:Yes, We Can Produce Products According To Your Requirements.
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Mr.Jasper
Company Address:Yanshan County,Cangzhou City,Hebei Province,China
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