Welcome to the

Mathey Dearman Pipefitter’s Square # D248

The Stainless Steel Pipefitter’s Square from Mathey Dearman is a precision Square designed specifically for pipefitters, boilermakers, welders and layout persons. After becoming familiar with the scales and tables of the Square, many complex problems encountered during pipe fit-up and layout work are easily solved.


The D248 Pipefitter's Square may be used to:

• Check the squareness of one surface to another.

• Find pipe center line.

• Determine the flange bolt length and diameter.

• Find the number of bolt holes in a flange

• Measure center-to-end dimensions of pipe elbows and tees.

• Find the through-hub length of a flange.

• Determine the outside diameter of a weld neck flange.

• Determine arc length for a given radius.

• Measure angles off horizontal or vertical plane with level.

• Measure in 12ths or 16ths of an inch.

• Solve triangles or offsets.

• Find decimal equivalents.

• Layout a variety of weld joint configurations.

• Blade Length St x Lg x Thick in (mm)
  15 1/2 x 24 x 1/8 Thick (394 x 610 x 3 Thick)