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Rigid coupling
Size Range: Available from 1″ to 12″ (DN25–DN300), other sizes on request.
Standards & Certification: Designed to meet ANSI, ASTM, ISO standards; FM, UL, and CE available.
Payment Methods: T/T, L/C at sight, and other negotiable international payment terms.
Supply Capacity: Stable mass production capability to support large-volume and long-term orders.
Standards & Certification: Designed to meet ANSI, ASTM, ISO standards; FM, UL, and CE available.
Payment Methods: T/T, L/C at sight, and other negotiable international payment terms.
Supply Capacity: Stable mass production capability to support large-volume and long-term orders.
- Rigid design ensures strong pipe alignment, high sealing performance, and leak-free connection.
- Made from high-strength ductile iron with corrosion-resistant coatings for long service life.
- Easy and fast installation, widely used in fire protection, water supply, HVAC, and industrial piping systems.
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Core Advantages
Provides a rigid and fixed pipe connection that prevents angular deflection, axial movement, and rotation after installation.
Ensures excellent sealing performance and long-term stability, comparable to welded or flanged joints.
Enables faster installation and easier maintenance compared with traditional pipe connection methods, reducing labor cost downtime.
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Design Drawings
The coupling consists of a ductile iron housing, high-quality elastomer gasket, and high-strength bolts and nuts.
Precision-designed groove profile ensures accurate pipe alignment and uniform gasket compression.
Detailed dimensional drawings and technical schematics are available to support engineering design and project installation.
According to different situations,the appearance can be dealed with epoxy powder,galvanized,paint,dacromet or your requirements.
| Nominal Size mmin |
Pipe O.D mm/in |
Working Pressure PSI/Mpa |
Bolt Size | Dimensions mm/in | ||
| No.-Size mm |
L | H | ||||
| 25 1 |
33.7 1.327 |
300 2.07 |
2-M10*45 | 55.6 2.188 |
98 3.858 |
44 1.732 |
| 32 1 1/4 |
42.4 1.669 |
300 2.07 |
2-M10*45 | 66 2.598 |
107 4.213 |
44 1.732 |
| 40 11/2 |
48.3 1.9 |
300 2.07 |
2-M10*45 | 74 2.913 |
115 4.527 |
44 1.732 |
| 50 2 |
60.3 2.374 |
300 2.07 |
2-M10*55 | 88.4 3.480 |
125 4.921 |
46 1.732 |
| 65 21/2 |
73.0 2.875 |
300 2.07 |
2-M10*55 | 102.2 4.024 |
140 5.512 |
46 1.772 |
| 65 21/2 |
76.1 3 |
300 2.07 |
2-M10*55 | 102.2 4.024 |
140 5.512 |
46 1.772 |
| 80 3 |
88.9 3.5 |
300 2.07 |
2-M10*60 | 117.4 4.622 |
154 6.063 |
46 1.772 |
| 100 4 |
108 4.25 |
300 2.07 |
2-M12*65 | 138.8 5.466 |
184 7.244 |
48 1.889 |
| 100 4 |
114.3 4.5 |
300 2.07 |
2-M12*65 | 146.6 5.772 |
190 7.480 |
48 1.889 |
| 125 5 |
133 5.25 |
300 2.07 |
2-M12*75 | 158 6.220 |
212 8.346 |
48 1.889 |
| 125 5 |
139.7 5.5 |
300 2.07 |
2-M12*75 | 171.2 6.740 |
220 8.661 |
48 1.889 |
| 125 5 |
141.3 5.56 |
300 2.07 |
2-M12*75 | 171.2 6.740 |
220 8.661 |
48 1,889 |
| 150 6 |
159 6.25 |
300 2.07 |
2-M12*75 | 192 7.559 |
240 9.448 |
48 2.008 |
| 150 6 |
165.1 6.5 |
300 2.07 |
2-M12*75 | 196.2 7.724 |
244 9.606 |
48 2.008 |
| 150 6 |
168.3 6.625 |
300 2.07 |
2-M12*75 | 199.4 7.850 |
246 9.685 |
48 2.008 |
| 200 8 |
219.1 8.625 |
300 2.07 |
2-M16*85 | 256.4 10.024 |
326 12,835 |
58 2.283 |
| 250 10 |
273 10.748 |
300 2.07 |
2-M20*100 | 316 12.441 |
426 16.771 |
64 2.520 |
| 300 12 |
323.9 12.75 |
300 2.07 |
2-M22*130 | 380 14.961 |
470 18.504 |
65 2.559 |
Application Fields
Widely used in fire protection and sprinkler systems for commercial, industrial, and residential buildings.
Suitable for HVAC, water supply, drainage, and water treatment piping systems.
Applied in industrial pipelines such as factories, power plants, oil & gas auxiliary systems, and infrastructure projects.
Factory Images
Modern manufacturing facilities equipped with automated casting, CNC machining, and surface treatment lines.
Strict in-house inspection processes including dimensional checks, pressure testing, and visual inspection.
Organized assembly and packaging workshops ensure consistent quality and efficient order fulfillment.
Certificates & Certification
Products are manufactured in compliance with international standards such as ANSI, ASTM, and ISO.
Certifications including FM, UL, and CE are available to meet global market requirements.
Full traceability and quality control documentation are provided to support project approval and audits.
OEM / ODM Customization Options
OEM branding options including logo casting, laser marking, and customized packaging design.
ODM support for customized sizes, pressure ratings, gasket materials, and surface coatings.
Flexible customization solutions to meet regional standards, special applications, and project-specific requirements.
Partner Brands & Collaboration
Long-term cooperation with international distributors, contractors, and system integrators.
Products supplied to fire protection, construction, plumbing, and industrial engineering brands worldwide.
Trusted partner for large-scale projects, long-term supply agreements, and repeat orders.
Packaging Information
Standard export packaging using strong cartons, wooden pallets, or steel-reinforced packaging.
Protective materials applied to prevent corrosion, impact damage, and deformation during transportation.
Customized packaging solutions available according to customer logistics and branding requirements.
FAQ
Q1: What size range is available for the rigid coupling?
A: Standard sizes range from 1″ to 12″, with other sizes available upon request.
Q2: What materials and coatings are offered?
A: Made from high-strength ductile iron, with coatings such as painted, galvanized, or epoxy for corrosion resistance.
Q3: Can the product meet international certification requirements?
A: Yes, the rigid coupling can be supplied with FM, UL, CE, and ISO-related certifications depending on market needs.
OUR LATEST
Our Latest Blog & News
Deeply Cultivating a Professional Track, Forging an Industry Giant
In Weifang, the world’s kite capital, Weifang Juntong Machinery Auxiliaries Co.,Ltd. is writing a legendary growth story in the grooved pipe fittings industry with its strong development momentum. Founded in 2004, Juntong Machinery established a high-starting point, high-standard, and large-scale business strategy from the very beginning. Today, it has grown into a modern enterprise integrating design, R&D, production, sales, and service, and is one of the largest professional manufacturers of grooved pipe fittings in Asia, firmly holding the third largest brand position in the industry.
Rugged Quality as a Guarantee, Certification Support for Global Expansion
“Survival through quality, development through technology, and benefits through brand” is the business philosophy that Juntong Machinery has always adhered to. To ensure product quality, the company has established standardized physical and chemical laboratories and mechanical performance laboratories, equipped with a full set of professional testing equipment such as spectrometers, metallographic analyzers, and material testing machines. From raw material selection to finished product delivery, the entire process is strictly controlled. Every product undergoes pressure testing before being released to the market, safeguarding pipeline connection safety with extreme rigor.
Foreign Trade Grows Against the Trend, Global Footprint Expands
Faced with a complex and ever-changing foreign trade environment, Juntong Machinery has achieved steady growth thanks to its technological advantages and accumulated quality. In the first quarter of 2025, the company’s export volume increased by nearly 30% year-on-year, with products exported to more than 30 countries and regions in Europe, South America, North America, and the Middle East, occupying a significant share of the international market. This impressive achievement is attributed to the company’s continuous expansion into new markets and constant improvement in product quality, as well as the precise empowerment from Weifang High-tech Zone—providing “one-stop” guidance through comprehensive business training for export-oriented enterprises, covering trade contract standardization, export tax rebate policies, and TikTok operation techniques, helping enterprises enhance their core capabilities in market expansion and risk prevention.
Seventeen years of dedicated development, solely for the safety and efficiency of pipeline connections.
From Weifang to the world, from workshop to project site.
Weifang Juntong, with an annual production capacity of 150,000 tons and multiple international certifications as its foundation,builds quality with professionalism and connects the world with integrity.
Choose Juntong for grooved pipe fittings, and enjoy worry-free global connectivity.
SERVICES
Services
Design and Consulting Services
Professional advice on grooved fittings material selection, installation guidance, construction code interpretation, as well as maintenance and troubleshooting.
Comprehensive Product Supply Services
Providing basic pipe fittings such as elbows, tees, reducers, as well as core accessories like clamps and sealing rings. Supports customized surface treatments including plastic coating and galvanizing.
After-sales support services
Include 24-hour technical consultation, product maintenance advice, and dedicated maintenance plans for high-demand projects. Additionally, we provide rapid disassembly and replacement guidance for faulty pipe components.
Customer Support
Customer Support:
Providing assistance to clients via multiple channels (phone, email, live chat) to address inquiries, resolve issues, and offer guidance on products or services.
Technical Assistance:
Offering expert help for troubleshooting technical problems related to products, software, or systems, ensuring smooth operation for users.
Billing and Payment Services:
Managing invoicing, processing payments through various methods (credit cards, bank transfers), and handling refunds or adjustments as needed.
Account Management:
Maintaining client accounts, updating information, tracking usage or purchases, and providing personalized support to foster long-term relationships.
Training and Onboarding:
Delivering tutorials, workshops, or materials to help clients or new users learn how to effectively use products, tools, or services.
Feedback and Improvement Services:
Collecting customer opinions through surveys or direct communication, analyzing feedback, and using insights to enhance products, services, or processes.
