A cast grooved end is a pipe fitting with a pre-machined groove cast directly into its body during manufacturing. This groove accommodates couplings, valves, or other grooved components, enabling quick assembly using bolts and gaskets. Cast grooved ends are commonly used in ductile iron or cast steel fittings, ideal for high-pressure and large-diameter systems where durability and precision are critical.
Key Dimensions of Cast Grooved Ends
The dimensions of cast grooved ends are defined by international standards such as ASTM A536 (ductile iron) and ISO 4144. Below are the critical parameters:
a) Nominal Pipe Size (NPS)
Determines the groove’s compatibility with pipe diameters.
Common sizes: 2″ (DN50) to 24″ (DN600).
Example: A 6″ (DN150) cast grooved end matches pipes with an outer diameter (OD) of 168.3 mm.
b) Groove Width (W)
The width of the cast groove must align with the coupling’s housing.
Standard range: 12 mm to 20 mm (0.47″ to 0.79″), depending on pipe size and pressure class.
c) Groove Depth (D)
Ensures proper gasket compression and coupling engagement.
Typical depth: 2 mm to 4 mm (0.08″ to 0.16″).
Deeper grooves are used for high-pressure systems (e.g., PN25).
d) Pitch Diameter (P)
The diameter measured at the groove’s midpoint, critical for coupling alignment.
Must match the coupling manufacturer’s specifications.
e) Distance from Fitting End (L)
The length between the fitting’s face and the groove centerline.
Ensures proper bolt clearance and joint assembly.
Standard range: 22 mm to 30 mm (0.87″ to 1.18″).
Industry Standards and Compliance
Cast grooved ends adhere to globally recognized standards to guarantee performance and interoperability:
ASTM A536: Specifies ductile iron grades (e.g., 65-45-12) for grooved fittings.
ISO 4144: Defines dimensions for non-threaded pipe connections.
AWWA C110: Covers cast iron and ductile iron fittings for waterworks.
FM/UL Approvals: Required for fire protection systems.
Why Dimensional Accuracy is Non-Negotiable?
Leak-Free Performance: Precise groove depth and width ensure uniform gasket compression.
Pressure Resistance: Correct dimensions prevent joint failure under cyclic stress.
Interchangeability: Compliance with ISO/ASTM allows global sourcing of compatible couplings.
Longevity: Cast grooved ends resist deformation, even in corrosive environments.
How to Choose the Right Cast Grooved End?
Consider these suppliers for optimal selection:
Material: Ductile iron (common), cast steel (high-temperature applications).
Pressure Class: Match groove depth to system pressure (e.g., PN16, PN25).
Application: Fire sprinklers, HVAC, or chemical processing.
Coating Requirements: Epoxy, galvanized, or Xylan coatings for corrosion resistance.
Partner with a Certified Company
At Fluid Tech Group, we specialize in cast grooved ends engineered to meet global standards. Our offerings include:
Custom Casting: Grooves tailored to unique pipe specifications.
Certifications: FM, UL, CE, and ISO 9001 compliance.
Comprehensive Support: CAD drawings, pressure test reports, and on-site technical guidance.