1.What is a Roll Grooved End?
A roll grooved end refers to a pipe end that has been mechanically grooved (rolled) to create a recessed channel. This groove allows the pipe to connect with other grooved fittings (e.g., couplings, elbows, or tees) using a gasket and bolts, forming a secure and flexible joint. The dimensions of the groove directly impact the joint’s pressure resistance, sealing performance, and ease of assembly.
2.Key Dimensions of Roll Grooved Ends
The following parameters define roll grooved ends, based on industry standards such as ASTM A53, ISO 4144:
a) Outside Diameter (OD)
The pipe’s nominal outer diameter must match the groove dimensions.
Common sizes: 1/2″ to 24″ (15 mm to 600 mm).
Example: For a 4″ (DN100) Schedule 40 steel pipe, the OD is 114.3 mm (4.5″).
b) Groove Width (W)
The width of the rolled groove must align with the coupling’s housing.
Standard range: 9.5 mm to 16 mm (3/8″ to 5/8″), depending on pipe size and pressure requirements.
c) Groove Depth (D)
Critical for ensuring the gasket seals properly and the coupling locks securely.
Typical depth: 1.5 mm to 3 mm (0.06″ to 0.12″).
Deeper grooves are used for high-pressure systems.
d) Pitch Diameter (P)
The diameter measured at the groove’s midpoint.
Must correspond to the coupling’s design to avoid misalignment.
e) Distance from Pipe End (L)
The length between the pipe’s end and the groove centerline.
Ensures proper engagement with the coupling.
Standard: 19 mm to 25 mm (0.75″ to 1.0″).
3.Industry Standards for Roll Grooved Dimensions
To guarantee global compatibility, roll grooved ends adhere to strict standards:
ASTM A53/A53M: Specifies dimensions for seamless and welded steel pipes.
ISO 4144: International standard for non-threaded pipe connections.
AWWA C606: Covers grooved couplings for waterworks applications.
4.Why Accurate Dimensions Matter?
Leak Prevention: Proper groove depth and width ensure the gasket compresses evenly.
Pressure Integrity: Correct dimensions prevent joint failure under high pressure (e.g., fire sprinkler systems).
Installation Efficiency: Uniform grooves allow quick, tool-free assembly.
Compliance: Meeting ASTM/ISO standards ensures approvals for international projects.
5.How to Select the Right Roll Grooved End?
Pipe Material: Carbon steel, stainless steel, or ductile iron.
Pressure Rating: Match groove depth to system pressure (e.g., PN16, Class 150).
Application: Fire protection, HVAC, or industrial pipelines.
Coupling Type: Ensure compatibility with “C” or “E” type grooved couplings.
6.Partner with a Trusted Supplier
At Fluid Tech Group, our brand IF grooved fittings and 1F pipe fittings provide roll grooved ends with precision-engineered dimensions compliant with ASTM, ISO, and AWWA standards. Our products include:
Custom Grooving: Tailored to your pipe specifications.
Third-Party Certifications: SGS, UL, and FM-approved.
Technical Support: Assist with dimension tables, CAD drawings, and installation guides.