Flange (Solid Style), FPT PVC Schedule 80 1-1/4" (852-012)

The 852-012 is a 1-1/4" PVC Schedule 80 solid style flange with a female pipe thread (FPT) inlet, designed to create a bolted flange connection at the end of a threaded PVC pipeline. The FPT inlet accepts any standard 1-1/4" NPT male-threaded pipe or fitting, while the flat face flange plate bolts directly to any mating 1-1/4" ANSI/ASME B16.5 Class 150 flange — including companion flanges, valve flanges, pump flanges, and equipment nozzles — using a flat face gasket and standard bolt pattern.

Manufactured from rigid, dark gray PVC compound conforming to ASTM D1784 cell classification requirements, the Schedule 80 solid style flange is produced from heavier-wall stock than Schedule 40 equivalents, providing the additional mechanical strength required to withstand bolt-up clamping forces, line pressure, and thermal cycling in demanding industrial and chemical service environments. The solid (non-van stone) flange body is a single molded piece — the flange face and hub are permanently integrated, eliminating the slip-on backing ring required by van stone style flanges and simplifying installation where a one-piece assembly is preferred or specified.

The all-PVC construction provides excellent resistance to a broad range of corrosive media including acids, caustics, chlorinated water, and many industrial process fluids, making the 852-012 a practical alternative to stainless steel or other corrosion-resistant metal flanges in chemical, water treatment, and municipal applications. At 1-1/4", this flange occupies a specific niche within the solid style FPT flange series — smaller than the common 1-1/2" and 2" commercial sizes of the 852-015 and 852-020, it is most frequently encountered at chemical dosing system connections, small pump suction and discharge ports, instrumentation assembly tie-ins, and filter vessel nozzles where a compact flanged termination at a sub-standard pipe size is required. The FPT inlet provides rotational alignment flexibility during assembly before final bolting, a practical advantage in tight mechanical spaces or panel-mounted assemblies where pipe alignment must be adjusted before the flange is committed to its final bolted position.

Specifications:

Industries & Applications:

• Chemical Processing — Bolted flange connections at small pump suction and discharge nozzles, chemical dosing equipment ports, and vessel tie-ins in corrosive service environments where all-PVC construction eliminates metal corrosion and galvanic compatibility concerns at compact 1-1/4" flanged connections
• Municipal Water & Wastewater — Pump station and treatment facility piping where 1-1/4" flanged connections are required at small pump flanges, chemical metering equipment, and instrumentation nozzles for serviceability and alignment at sub-standard pipe sizes
• Industrial Process Piping — Flanged terminations in cooling water, process fluid, and chemical distribution systems at the 1-1/4" pipe size where robust Schedule 80 construction and bolted joint integrity are required at compact equipment connections
• Water Treatment & Filtration — Flanged connections at small filter vessel nozzles, chemical dosing metering pumps, and membrane housing ports in potable water and industrial water treatment systems where the 1-1/4" size is dictated by equipment port specifications
• Irrigation & Agriculture — Flanged tie-ins at chemical injection pump discharge, small filter connections, and metering equipment ports in pressurized irrigation systems where a serviceable bolted connection is required at a 1-1/4" equipment interface
• HVAC & Mechanical — Flanged connections at small mechanical equipment nozzles, chemical feed system ports, and instrumentation tie-ins in chilled water and process cooling systems where PVC is specified for corrosion resistance and the 1-1/4" flanged joint must remain accessible for future maintenance or equipment replacement