Product Overview

TheDuctile Iron Grooved Flexible Pipe Fittings are high-quality, UL/FM certified pipe connections designed for fire protection systems, water supply networks, and industrial piping applications. Manufactured from ASTM A536 Grade 65-45-12 ductile iron (QT450-10), these fittings provide exceptional strength, durability, and corrosion resistance in demanding environments. The grooved connection design enables fast, reliable installation without welding or threading — simply align the pipe ends and secure with grooved couplings. Available in a comprehensive range of types including elbows, tees, couplings, caps, flanges, and adapters, these fittings accommodate sizes from 1″ to 12″ with a maximum working pressure of 363 PSI (25 bar). The flexible design compensates for pipe expansion, contraction, and minor misalignment, reducing stress on the piping system. With multiple surface finish options — including red epoxy, blue epoxy, hot-dip galvanized, and black paint — these fittings are suitable for both indoor and outdoor fire protection installations. They are the trusted choice for fire sprinkler systems, standpipes, fire hydrant networks, and industrial pipelines.

Ductile Iron Grooved Flexible Pipe Fittings

Technical Specifications

Key Features

1. Premium Ductile Iron Construction – ASTM A536 Grade 65-45-12
2. Grooved Connection – Fast, Reliable Installation
3. Flexible Design – Compensates for Expansion & Misalignment
4. Multiple Surface Finish Options – Corrosion Protection
5. UL/FM Compliant – Fire Protection Certified
6. Wide Product Range – Full System Compatibility
7. Salt-Resistant – Suitable for Marine Environments

Ductile Iron Grooved Flexible Pipe Fittings

Product Types

Applications

1. Automatic Fire Sprinkler Systems
2. Fire Hydrant & Standpipe Systems
3. Industrial Fire Protection
4. Water Supply & Distribution
5. HVAC & Industrial Piping

Ductile Iron Grooved Flexible Pipe Fittings

Packing and Shipment

Packing depends on the product type and quantity. Options include carton boxes or wooden crates with proper protection for grooved ends and threads. Shipment can be arranged by sea, railway, air, or as per customer’s request.

Company Profile

Luoyang Datang Energy Tech Co., Ltd. is a professional industrial pipe fitting and valve supplier, dedicated to providing reliable piping solutions for fire protection, HVAC, water treatment, and industrial piping systems worldwide. All products are manufactured to international standards with CE and ISO 9001 certifications. With over 10 years of experience, a modern facility of 80,000 m², and 200+ professional employees, we serve customers in 10+ countries with quality products, competitive pricing, and reliable delivery.

Payment Terms

T/T, L/C at sight, Western Union, PayPal, Apple Pay, Google Pay, Credit Card, etc.

Ductile Iron Grooved Flexible Pipe Fittings

FAQ

Q1: What is the difference between grooved connections and welded connections?

A: Grooved connections utilize mechanical couplings and require no welding, threading, or hot work; they install 3–5 times faster and are suitable for space-constrained areas or locations where hot work is prohibited. Welded connections provide permanent joints but require professional welders and hot work permits. Grooved connections also allow for a degree of pipe deflection and axial movement, accommodating thermal expansion and building settlement.

Q2: What is the difference between flexible couplings and rigid couplings?

A: Flexible couplings allow for angular deflection (up to 4°) and axial movement (±3 mm), making them suitable for areas subject to thermal expansion, building settlement, or seismic activity. Rigid couplings provide a fixed, stiff connection that prevents pipe movement, making them suitable for straight pipe runs requiring precise alignment.

Q3: What is the difference between ductile iron and gray cast iron?

A: Ductile iron (QT450-10) features a spheroidal graphite structure; its tensile strength (350 MPa) and yield strength (310 MPa) are far superior to those of gray cast iron, offering better toughness and impact resistance. Gray cast iron has lower strength and is more brittle. Ductile iron is the preferred material for fire protection and high-pressure piping systems.

Q4: What is the difference between epoxy coating and hot-dip galvanizing?

A: Epoxy coating offers excellent chemical corrosion resistance; the red or blue color facilitates easy identification of fire protection piping, making it suitable for indoor fire systems. Hot-dip galvanizing (70 μm) provides superior corrosion resistance, making it suitable for outdoor, coastal, and humid environments. The choice depends on the installation environment and corrosion resistance requirements.

Q5: What tools are required to install grooved fittings?

A: Installing grooved fittings requires grooved couplings, a torque wrench, lubricant, and pipe cutting tools. No welding equipment, threading machines, or hot work tools are needed. Installers can perform the work after minimal training, significantly lowering the barrier to entry for installation.

Ductile Iron Grooved Flexible Pipe Fittings