Flange (Solid Style), Slip PVC Schedule 80 2" (851-020)

The 851-020 is a 2" PVC Schedule 80 solid style flange in a slip (socket) end configuration. The slip end accepts 2" plain-end pipe for solvent welding, while the integral flange face — fixed permanently to the flange body as a single molded unit — mates flat against a corresponding flange face and is sealed with a full-face or ring gasket compressed by the flange bolts. The result is a fully demountable, bolted connection point at the end of a solvent-weld PVC pipe system, allowing connected equipment, valves, pumps, or pipeline sections to be unbolted and removed without cutting any pipe.

The solid style flange differs from the loose ring flange (856-020) in one important and practical way: the flange ring and the socket body are a single integrated piece rather than a separate rotating collar over a spigot body. This one-piece construction gives the solid flange a simpler, more compact profile and eliminates the rotating ring component entirely — making it the preferred choice where the pipe can be oriented during installation to align the bolt holes before the solvent-weld joint is made, and where the additional complexity of a loose ring is not needed or not specified.

Because the bolt holes are fixed relative to the pipe socket in the solid style, bolt hole alignment must be achieved by rotating the pipe before the solvent-weld joint sets. This is straightforward in new construction where pipe orientation can be planned from the outset, but less practical in retrofit or repair situations where an existing solvent-welded pipe cannot be rotated — which is where the loose ring flange holds its advantage. For most new installation work, the solid flange is the standard specification.

The slip end creates a permanent solvent-weld joint that becomes part of the pipe system, while the bolted flange face remains fully demountable. At 2", flanged connections of this type are standard at pump suction and discharge ports, at the inlet and outlet of large inline valves and strainers, at transitions to metal piping or equipment flanges, and anywhere a bolted break-point is required for future maintenance access.

Built to Schedule 80 wall thickness standards from rigid PVC compound, the 851-020 carries the elevated pressure ratings required for demanding industrial and commercial pressure service. Like all Schedule 80 PVC fittings, it is fully resistant to corrosion, chemical attack, and biological fouling — with none of the rust, galvanic corrosion, or weight concerns associated with metal flanges of equivalent pressure rating.

Specifications:

Industries & Applications:

• Industrial Process Piping — Creating demountable bolted connection points on 2" Schedule 80 process lines at pump ports, inline equipment, and planned maintenance break points in new construction where pipe orientation can be set before solvent welding
• Chemical Processing — Installing flanged connections in corrosive-fluid PVC systems at equipment interfaces where a bolted, gasketed joint is required and the one-piece solid construction is preferred over a loose ring assembly
• Water Treatment & Municipal — Connecting PVC Schedule 80 distribution or treatment piping to pumps, large valves, and metal pipeline sections via flanged joints at treatment plants and pump stations
• Irrigation Systems — Installing flanged connection points on 2" Schedule 80 mainlines at pump stations, filter housings, or control valve assemblies in large commercial or agricultural irrigation infrastructure
• Commercial Plumbing — Creating bolted access points in high-pressure PVC mechanical systems at equipment connections where the flanged joint allows component removal without cutting into the pipe system
• Industrial HVAC & Cooling — Connecting 2" Schedule 80 chilled water, cooling tower, or chemical treatment lines to pumps, heat exchangers, and other flanged mechanical equipment