Flange Joint Alignment: Why It Matters

Flange Joint Alignment

Why It Matters?

Flange joints are a critical component in piping systems, providing a method for connecting pipes, valves, & other equipment, and ensure a tight seal.

The ASME Piping Code B31.3 (1999 Edition) 335.1.1 9 (c)

Before

Lateral Mis-Alignment on a 56" Flange Joint Connection. — 56″ Class 150 flanged joint falls out of alignment during break out.

This code specifies the following Flange Joint Misalignment Tolerances:

Proper alignment of flange joints is essential to maintain the integrity of the connection and prevent leaks.

The maximum for lateral or center-line offset is 1.5 mm or less than 1/16”.
For rotational misalignment the Piping code specifies that it be a maximum 3 mm or less than 1/8”.

The above tolerances refers to pipe work being connected to pumps, rotating equipment & pressure vessels.

Flange Joints & The Role of Alignment Tools

After

Mechanical Alignment Tools on a 56" Flange — 2 Mechanical Flange Alingnment Tools align a 56″ Class 150 flanged joint in minutes.

See customer’s review in the image below!

Understanding the importance of flange joints and alignment tools is crucial for professionals tasked with constructing, commissioning, or maintaining piping systems. Flange joints play a key role by connecting pipes, valves, pumps, and other equipment, creating a secure seal while allowing for straightforward assembly and disassembly during maintenance or repair. They help reduce accidents, leaks, and minimize time spent on tasks.

Consequently, flange alignment tools are invaluable for the precise installation and maintenance of flange joints. These tools ensure flanges are properly aligned before bolts are tightened, preserving the integrity and functionality of the connection.

Click Image to Enlarge

Customer review published in BIC Magazine for correcting a 56" flange mis-alignment. — Customer review published in BIC Magazine

Mis-Alignments & Tooling Solutions

Lateral Misalignments

Lateral misalignment can occur at any point around the flange joint circumference

Rotational Misalignment

Rotational misalignment is when the axis of the flanges align but the bolt holes are not. They are occasionally found when the flanges have been poorly fabricated or there are other forces acting on the flange joint such as overhang weight (relaxed state) or pipe work configuration

Flange Alignment Solutions

Designed for Medium size low pressure joints.	Designed for large flanges high pressure joints.
Click on image to see case study page 1 “Installation of Blind”	Click the image to see case study page 2 “Installation of Blind”

Key Benefits:

Enhanced control and precision.
Provides 4-9 tons of aligning force ensures the operator no job is to big.
Increases safety and efficiency, reducing risks and minimizing downtime