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Red polyvinylidene Schedule 80 pipe flange, 4 1/4 in diameter, 4 bolt holes, socket connection

Zoro Select

Zoro Select 6551-H Flange 1 in Schedule 80 150 psi 73 to 280 F

SKU CH-8QFT-F3MWR

A 1-inch Schedule 80 polyvinylidene flange rated for 150 psi across 73 to 280 degrees Fahrenheit

  • Schedule 80 rated for 150 psi service
  • Operates from 73 to 280 degrees F
  • Polyvinylidene construction resists chemical attack
  • Four bolt holes on 3 1/2 in circle
  • Socket connection fits 1 in nominal pipe

1 inch Schedule 80 Flange

The Zoro Select 6551-H is a polyvinylidene socket flange designed for 1 inch nominal pipe size in Schedule 80 systems. It suits industrial plumbing installations that require a Class 150 pressure rating and a 4 1/4 inch outside diameter.

150 psi at 280 °F pressure rating

The flange withstands a maximum operating pressure of 150 psi across a temperature range of 73 to 280 degrees F. This single limit determines whether the part matches the design conditions of your piping system.

Thermal range and bolt pattern

The material remains within its rated envelope from 73 up to 280 degrees F without derating. Four bolt holes on a 3 1/2 inch circle accept 5/8 inch hardware for a secure, leak-resistant joint.

Highlights

  • Schedule 80 rated for 150 psi service
  • Operates from 73 to 280 degrees F
  • Polyvinylidene construction resists chemical attack
  • Four bolt holes on 3 1/2 in circle
  • Socket connection fits 1 in nominal pipe

Specifications

BrandNIBCO

Questions about this item

What does the 150 psi rating mean once this flange is installed in a working system?

It sets the maximum operating pressure the joint can handle at the rated temperature range; exceeding 150 psi risks leaks or failure.

How does the Schedule 80 class affect what piping this flange connects to?

It matches Schedule 80 pipe dimensions, so the socket fits only pipe with that wall thickness; other schedules will not seal correctly.

What bolt pattern and hardware does the 3 1/2 in bolt circle require for mounting?

Four bolts through 5/8 in holes on a 3 1/2 in circle; use matching gaskets and torque to the pipe-system specification.

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