Grooved fittings and couplings in ASTM A536 Grade 65-45-12 ductile iron offer a strong, ductile, and dependable solution for demanding piping applications.
Designed for fast installation without welding, threading, or flanging, they are suitable for fire protection, HVAC, water, industrial, utility, and mechanical piping systems.
Min. tensile strength (448 MPa)
Yield strength (310 MPa)
Common pressure rating
Why Grooved?
Using ductile iron couplings and fittings, the system joins grooved pipe ends with a pressure-responsive gasket, housing segments and high-strength bolts and nuts.
No welding, flame or hot work
Reduces installation hazards, site disruption and labour requirements.
Installed faster than welded joints
Helps contractors complete projects efficiently.
Rigid and flexible designs
Rigid couplings secure straight pipe runs. Flexible couplings accommodate controlled movement, vibration, thermal expansion, contraction and minor deflection.
Easy to disassemble
Maintenance, replacement, expansion and future modifications are more convenient.
Gasket sealing system
The gasket is installed over the prepared pipe ends before the coupling housings are fitted. When the bolts and nuts are tightened, the gasket is compressed to form a tight seal around both pipes. Gasket material must be selected according to the conveyed fluid, operating temperature, pressure, and environmental conditions.
EPDM · Nitrile · Silicone · Other elastomers
Confirm before ordering: EPDM, nitrile, silicone, and other elastomer compounds may be available for different services. The correct gasket compound should always be confirmed before ordering, particularly for oil, fuel, chemical, high-temperature, potable-water, vacuum, or dry-pipe applications.
What is roll grooving
Roll grooving is a cold-forming method used to prepare pipe ends for mechanical grooved couplings. The pipe is rotated between forming rolls, which displace the pipe wall inward to create a precise circumferential groove without removing material. This process provides fast, consistent pipe preparation while retaining more of the original pipe wall than cut grooving.
All roll grooving should be carried out by trained personnel using approved equipment, calibrated inspection tools, and the groove dimensions specified by the coupling manufacturer.
01 Prepare the pipe end
The pipe end must be square-cut, clean, free from dents and projections, and checked for weld seams or other surface irregularities.
02 Set rolls and depth
The correct roll set and depth setting must be selected for the pipe outside diameter and wall thickness.
03 Inspect the groove
After forming, the groove must be inspected for uniform diameter, width, depth, and pipe-end condition before the coupling is installed.
Our ASTM A536 Grade 65-45-12 ductile iron grooved couplings are available in pressure ratings commonly ranging from 300 psi to 500 psi, depending on the coupling type, size, pipe specification, groove profile, gasket material and application. The final allowence working presuure must be confirmed from the product data sheet and shall not exceed the rating of the lowest-rated component in the piping assembly.
Pressure ratings are based on correct pipe preparation, compatible pipe dimention, proper gasket selection, manufacturer-approved bolt tightening, adequate pipe support, and installation in accordance with the applicable product standard and manufacturer's instructions.
