Style B coupling offers favorable corrosion resistance and represents an economical choice since it is constructed from 316 alloy. Better suited for brackish and fresh water, the style B coupling will perform well under pressures as high as 600 psi. Consult Piedmont application engineering for guidance on the selection of plastic or metal alloy for your application.
Applications can impose severe-duty factors in addition to the maximum continuous operating pressure rating. These additional design requirements must be considered in selecting the appropriate Piedmont coupling.
An example of a severe-cyclical duty consideration is piping in the immediate proximity of the discharge of reciprocating, positive displacement piston pumps including the energy recovery devices of this type used in the seawater desalination industry.
Piping components, including grooved end pipe couplings, can be subjected to severe cyclical duty in industrial and desalination plants and engineers and designers need to assure that piping system pulsations and axial displacements are adequately provided for in the piping system design, particularly geometry.
Piping system displacements impart compressive and tensile loads in addition to the axial and hoop stresses arising from both continuous operating pressure and localized pulsation conditions. Displacement loads from reciprocating pumping devices impose additional stresses and require greater strength of the piping-joint components compared to piping components throughout the remainder of a plant at similar pressure, but not subjected to these additional loads. Contact Piedmont for assistance during the early stages of such designs.
600 psi (40 bar) with schedule 40s pipe with cut groove only – all sizes.
For pressure ratings for other pipe schedules and groove types, please refer to the table below or consult with Piedmont.
* Stainless steel 316 is used for its resistance to corrosion. Highly durable, stainless steel requires low maintenance and is ideal for fresh water applications.
|Style B Specifications|
|Nominal size||X||Y||Z||Aprx Weight||Pressure rating*|
* Pressure rating when cut grooves and sch 40 pipes are used.
Note: It is allowed a single hydrostatic proof test at 1.5 x rating pressure before being put in operation at its rated pressure or less.
|Working pressure Ratings|
|Pipe weight||Less than 2” dia.||Bigger than 2” dia.|
|Schedule 40s||600 psi (40 bar)||600 psi (40 bar)|
|Schedule 10s||600 psi (34 bar)||350 psi (24 bar)|
|Schedule 5s||300 psi (20 bar)||175 psi (12 bar)|
For the use of Style B couplings on cyclic axial displacement systems, please consult with Piedmont for design and installation guidance
Piedmont couplings are sold as a whole including the housing, the gasket, the bolts, nuts and washers when necessary. Please specify the coupling size and gasket type required.