UL FM Grooved Flexible Couplings

Our Grooved Rigid Coupling is a high-performance fire protection piping connector, crafted from ductile iron with anti-corrosion coating and leak-proof rubber gasket. Compliant with GB/ISO/AWWA standards and 3C certified, it offers 1.6-2.5MPa pressure resistance and covers DN50-DN200 specifications for diverse engineering needs. Featuring tool-free, bolt-fastened installation, it balances durability, compatibility, and efficiency for fire protection, water supply, and HVAC systems.

Application Scenarios:Fire protection piping systems, water supply/drainage pipes, gas/air-conditioning engineering pipe connections
Material :Body: Ductile iron (red anti-corrosion coating); Seal: Rubber gasket
Key Features:Rigid connection, pressure-resistant & corrosion-resistant, easy installation, leak-proof

Product category:

UL/FM Grooved pipe fittings

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linhaifeng117@gmail.com

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Product Details

Product Formation

This Grooved Rigid Coupling is a high-performance piping connection component, specifically engineered for reliable and efficient assembly in fire protection, water supply, drainage, gas, and HVAC systems.

Crafted from ductile iron and fitted with a premium rubber gasket, it delivers robust rigidity, pressure resistance , and long-lasting leak-proof sealing. Compliant with global standards and certified by 3C & PICC, it ensures safety and compatibility with standard steel pipes .

Its bolt-fastened design enables quick, tool-friendly installation—no welding or threading required—reducing on-site labor time while maintaining structural stability. Ideal for both commercial and industrial piping projects, this coupling balances durability, convenience, and cost-effectiveness.

KEY WORDS：Grooved rigid coupling、Fire protection pipe clamp、Ductile iron grooved coupling、 grooved pipe fitting、grooved coupling、 grooved clamp、Leak-proof pipe coupling、Grooved fitting for fire system、Rigid pipe connector for water pipe、3C certified grooved coupling

Product Features

1.Rbust Rigid Connection：Crafted from high-strength ductile iron, it provides stable, non-deformable piping connections to resist external impact and pressure fluctuations.

2.Superior Leak-Proof Performance：Equipped with a high-quality rubber gasket (oil/aging-resistant), it forms a tight seal even under 1.6MPa (or 2.5MPa) working pressure.

3.Corrosion & Wear Resistance：The red anti-corrosion coating on the surface effectively isolates moisture/chemicals, extending the service life in harsh environments (e.g., fire/water supply systems).

4.Quick & Tool-Friendly Installation：Bolt-fastened design eliminates welding/threading work—completes assembly in minutes, cutting on-site labor costs.

5.Global Standard Compliance：Meets GB 5135.11, ISO6182, AWWA C606 standards, and holds 3C certification, ensuring compatibility with international piping systems.

6.Wide Specification Coverage：Available in DN50-DN200 (matching common steel pipe sizes), suitable for fire protection, water supply, HVAC, and gas engineering scenarios.

Product Parameter

Parameter Category	Details
Product Name	Grooved Rigid Coupling (Fire Protection Coupling/Steel Clamp)
Application Scenarios	Fire protection piping systems, water supply/drainage pipes, gas/air-conditioning engineering pipe connections
Material	Body: Ductile iron (red anti-corrosion coating); Seal: Rubber gasket
Design Standards	GB 5135.11, ISO6182, AWWA C606 (compliant with national standards)
Certifications	3C certification, PICC underwriting
Nominal Pressure	1.6MPa (up to 2.5MPa for some specifications)
Common Specifications (DN)	Corresponding steel pipe outer diameter:
	- DN50: 60.3mm
	- DN80: 88.9mm
	- DN100: 114.3mm
	- DN150: 165mm
	- DN200: 219.1mm
Bolt Configuration	Varies by specification:
	- DN50~DN80: 2-M10 bolts
	- DN100~DN150: 2-M12 bolts
	- DN200: 2-M16 bolts
Max Outline Dimension (Example)	DN100 (OD 114): Diameter 150mm, Length 195mm, Height 51mm
Key Features	Rigid connection, pressure-resistant & corrosion-resistant, easy installation, leak-proof

FAQ

Q: Can you accept sample order?

A: Yes, we accept samples with little and reasonable charge.But need customer pay sample fees and transport fees first.

Q: What is your payment terms?
A: Payment supports T/T, L/C, etc.

Q: How can l get my order?
A: We will send you the goods by UPS,DHL,FedEx,Oversea Shipment or other forwarder, all with tracking number.

Q: Why choose us?
A： With over 15 years of experience in the fire protection industry, our company has professional technical personnel and many well-known partners in the domestic market. We offer favorable prices and guarantee quality, having passed multiple certifications!

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With more than 15 years of experience serving clients, we have developed extensive expertise and in-depth industry knowledge, enabling us to deliver reliable and effective solutions tailored to your requirements.
We provide professional technical support and customized service offerings. Our committed technical team is available to assist you with product consultation, installation guidance, and comprehensive after-sales support whenever necessary.
At Sheng Feng Fire, our professionals are dedicated to helping you select the most suitable products based on your specific needs.
Please do not hesitate to contact us for further information.