Flanged Pipe & Fittings Description

ACIPCO produces 100mm through 1600mm ductile iron flanged pipe with threaded flanges for water or other liquids in accordance with ISO 2531. Maximum length of flanged pipe is 5.9m; any length less than 5.9m can be furnished down to the minimum practical length, varying with pipe size. Flanges generally are threaded on all flanged pipe, except for short lengths of pipe which may be produced statically.

ACIPCO Flanged Pipe

Flanged pipe is generally specified for aboveground service for air, water, sewage, and other liquids where rigid, restrained joints are needed. It is widely used in industrial piping systems, pump stations, water treatment plants, sewage treatment plants, and for other interior piping.

Long runs of flanged pipe should normally include a provision for expansion and contraction, such as flexible joints or couplings at strategic intervals.

Pipe may be furnished with one end flanged and the other end with Fastite® bell, plain end, or other type end as may be required.

The underground use of the flanged joint is generally not desirable due to the rigidity of the joint.

Pipe Barrel and Flanges

1. Ductile iron flange 2. Ductile iron pipe barrel 3. ACIPCO standard pipe threads, ANSI B2.1, adapted to ductile iron outside diameters 4. Pipe end and barrel machined simultaneously to a flush finish 5. Shroud for thread protection

Ductile iron pipe barrels conform to the requirements of ISO 2531. Unless otherwise specified, flanges for ductile iron pipe are ductile in accordance with ISO 2531. (ACIPCO recommends ductile iron flanges for strength and safety.)

Flanges conform to the chemical and physical properties specified for ductile iron fittings in ISO 2531.

Pipe barrels and flanges have tapered pipe threads (NPT) in accordance with ANSI B2.1 adapted to the ductile iron pipe outside diameters.The flange is threaded onto the pipe and machine tightened until the pipe end projects beyond the face of the flange; it is then machined to give a flush finish of the pipe end and flange and to ensure that the flange face is perpendicular to the axis of the pipe. The flange is designed so that a shroud covers the threaded portion of the pipe for thread protection. Prior to assembly of the flange on the pipe, a commercial-grade thread compound is applied to the threads to ensure leak-free fabrication.

ACIPCO flanged pipe is shop fabricated as covered by AWWA C115, and threading at the job site is not recommended. Flanges furnished on pipe are not interchangeable in the field and generally cannot be removed after fabrication without damaging the pipe or flange threads. If installation conditions require assembly of the flange on the job, the flange may be factory assembled to a "hand-tight" condition. This permits removal and re-assembly at the job site, at which time suitable thread compound must be used. It is recommended that "hand-tight" flanges be limited to 400mm and smaller sizes because of the difficulty in tightening larger flanges at the job site.