1-1/2" Flange (Loose Ring), Slip PVC Schedule 80 (854-015)

The 854-015 is a 1-1/2-inch Schedule 80 PVC loose ring flange — also known as a Van Stone flange or lap joint flange — with a slip (socket) pipe-end connection on the stub end body. This fitting occupies a specific and well-defined position among Schedule 80 PVC flange options: it combines the post-installation bolt hole alignment flexibility of the loose ring design with a slip socket pipe-end connection that directly receives standard Schedule 80 PVC pipe for solvent weld assembly. It is the correct flange choice when both of these characteristics are simultaneously required — a permanently solvent welded pipe connection at the stub end and a freely rotating flange ring that can be aligned to any bolt hole orientation after the cement has fully cured.

The 854-015 is a two-piece assembly consisting of a PVC stub end and a separate flange ring. The stub end body carries the slip socket pipe-end connection and the flat flange sealing face. The slip socket bore accepts standard 1-1/2-inch Schedule 80 PVC pipe, which is solvent welded into the socket to create a permanent, pressure-rated joint integral to the pipe run. The separate flange ring slides over the stub end body before the pipe is solvent welded in place, sits behind the stub end's flange face, and rotates freely around the stub end at all times — before, during, and after installation. The ring carries the ANSI 150 lb bolt holes and bears against the mating flange when the assembly is bolted up, drawing the stub end's flat face tight against the full-face gasket and mating flange face.

Three distinctions from related Schedule 80 PVC flange entries in this catalog are worth addressing directly to ensure correct product selection. The first is the 851-015 — a solid style flange with a slip socket pipe-end connection. The 851-015 shares the slip socket pipe-end connection of the 854-015 but is a one-piece integral fitting where the bolt holes are fixed in orientation at the time of solvent weld installation and cannot be rotated afterward. The 854-015 is the correct choice over the 851-015 when bolt hole alignment to the mating flange cannot be confirmed during the solvent weld operation — field installations with constrained pipe orientation, pre-fabricated assemblies, or any situation where the pipe must be cemented before the mating flange position is finalized.

The second is the 856-015 — a loose ring flange with a spigot pipe-end connection. The 856-015 shares the loose ring rotating design of the 854-015 but its stub end has a spigot end (a plain male end with the same OD as Schedule 80 pipe) that inserts into the female socket of a mating fitting or coupling. The 854-015's slip socket receives pipe directly; the 856-015's spigot inserts into a fitting socket. The correct choice between the two depends on the pipe assembly at the flange location — if the flange installs directly onto a cut pipe end, the 854-015 slip socket is the appropriate connection; if the flange must connect fitting-to-fitting at a socket joint, the 856-015 spigot end is the correct choice.

The third is the 852-series solid style flange with an FPT threaded pipe-end connection — a permanently fixed one-piece flange body with a female NPT threaded bore rather than a solvent weld socket. The 852-series is the correct choice when the pipe-end connection must be threaded and serviceable; the 854-015 is correct when the pipe-end connection is a permanent solvent weld.

The flange ring is drilled to the ANSI/ASME B16.5 Class 150 pattern — the industry-standard 4-bolt configuration at 1-1/2-inch nominal size — ensuring compatibility with standard mating flanges across manufacturers and materials. Gray Schedule 80 PVC provides the pressure rating and chemical resistance required for industrial chemical process, water treatment, and utility service. The stub end is manufactured from virgin PVC compound conforming to ASTM D1784 Cell Classification 12454 and dimensioned to ASTM D2467 standards for Schedule 80 PVC socket fittings.

Specifications:

Pressure rating reflects Schedule 80 PVC stub end at 73°F water service. Assembled flange joint ratings depend on gasket material and compression, bolt torque, mating flange material, and fluid service conditions. Always use a full-face gasket with PVC flanges. Slide the loose ring onto the pipe before solvent welding the stub end — the ring cannot be installed after the pipe is cemented. Do not overtighten flange bolts — follow manufacturer torque specifications for PVC flange assemblies to avoid cracking the stub end face.

Industries & Applications:

The 854-015 loose ring slip flange is specified wherever permanent solvent weld flanged connections are required on 1-1/2-inch Schedule 80 PVC pipe runs and post-installation bolt hole alignment flexibility is needed or preferred:

• Chemical Processing & Water Treatment — Permanent solvent weld flanged connections on 1-1/2-inch Schedule 80 chemical feed, chlorination, acid dosing, and reagent distribution lines at pump nozzles, filter vessel ports, and treatment skid connections where the loose ring design accommodates bolt hole alignment after piping is routed and cemented in chemically complex or access-constrained installation environments
• Pump Connections & Packaged Equipment Assemblies — Flanged terminations on 1-1/2-inch Schedule 80 pump suction and discharge piping on pre-fabricated pump skids and packaged equipment assemblies where the pipe orientation is fixed by the skid layout before the mating pump flange position is confirmed — the loose ring allows bolt hole alignment to be achieved by rotating the ring rather than reorienting the entire pre-fabricated pipe assembly
• Field Installations with Constrained Pipe Orientation — Any application where 1-1/2-inch Schedule 80 PVC pipe is routed to a flanged connection point under physical constraints — structural obstructions, confined equipment rooms, or complex multi-plane pipe runs — that prevent precise rotational positioning of the pipe assembly during solvent weld installation; the loose ring eliminates the need for this precision by allowing post-cure bolt hole alignment
• Industrial Process Piping — Flanged isolation and equipment connection points on 1-1/2-inch Schedule 80 process loop and chemical distribution piping where the permanent solvent weld slip connection is specified for its joint strength and chemical resistance while the loose ring provides installation flexibility on complex pipe routing
• Swimming Pool & Aquatic Facility Plumbing — Permanent flanged connections on 1-1/2-inch Schedule 80 pool and spa recirculation piping at pump and filter equipment flanges where the loose ring design simplifies bolt hole alignment in the often-congested equipment rooms of commercial aquatic facilities
• Municipal Water & Wastewater Treatment — Pump skid connections, equipment nozzle interfaces, and valve isolation flanges on 1-1/2-inch treatment plant piping where the combination of permanent solvent weld pipe connection and post-installation ring alignment reduces installation time and rework risk on multi-flange assemblies in complex mechanical spaces
• Agricultural & Irrigation Systems — Permanent flanged connections on 1-1/2-inch Schedule 80 pump system and pressurized irrigation piping at pump flanges, filter housing nozzles, and flow control equipment where the loose ring simplifies field assembly in pump houses and equipment enclosures where pipe routing constraints are common