FAQ Category: Education

What is flanging?

Pipe-flanging machines permit the joining of pipe sections without the need for costly welded flanges and the associated temporary tack welding, slag removal and x-ray inspection.

Flanging - Van Stone Conrac illustrationA prefabricated slip flange is placed against the assembly on an adjacent pipe section A discshaped rubber seal placed between the two formed flanges prevents any leaks. Problems in liningup bolt holes are eliminated with the use of slip flanges which rotate freely on the pipe. Standard flanges can still be used.

Typical Applications: Chemical plants, petroleum refineries, power plants, and pipelines.

See PHI’s tube and pipe end-finishing machines.

What are double-lap flares?

Flare fitting illustration

Double-lap flaring tube double flare AS33583 MS33583 illustration

Double-lap flares provide added-strength joints which are more resistant to fatigue and provide a better seal than single-thickness flares.

Double-lap flares formed by PHI machinery and tooling are free of cracks and pit marks. The joint is also designed so that the inside surface of the flare has a larger diameter than the inside diameter of the tube or pipe, and, therefore, does not interfere with flow characteristics of the system.

Typical Applications: Thin-wall tubing connections that are subject to shock, vibration, or high internal pressures such as automobile brake lines and critical aircraft hydraulic lines.

See PHI’s tube and pipe end-finishing machines.

What is beading?

Beaded tube fitting

Beading Tube SAE AS5131 MS33660 illustration

Beading is a versatile end-finishing technique that can be applied to a variety of industrial applications in conjunction with an O-ring, for example, beaded joints can be used to interconnect exhaust tubes or low-pressure fuel lines.

Beads can also be used to dampen vibration in solid lines, or to increase the effectiveness of the seal when a rubber or fabric sleeve is clamped to a metal duct.

Typical applications: Low pressure air, exhaust, and liquid systems in the automotive, appliance and boating fields.

See PHI’s tube and pipe end-finishing machines.

What are some solutions for poorly bent tubes?

PHI’s Bending Guide has solutions to many of the common problems that result in poorly bent tubes. Download your free copy here: PHI Bending Guide

What is the tube and pipe bending process?

Tube/pipe bending is the process of bending tubes or pipes with the aid of computer-operated machines that curve segments of tubes to exact specifications. This process can be completed with cold or hot working machines. Whether the bending task is automated or done manually, the mechanical properties of the tube or pipe are usually altered during the bending process. Industries that require complex reshaping of tubes and pipes demand accurate tube bending machines. PHI has been a leading producer of precise tube forming machinery for over 50 years.

See PHI’s tube and pipe bending machines →
Back to top