What is a weldolet (Welding Outlet)?

Weldolet (Welding Outlet) is the most common of all branch connections, and is welded onto the outlet pipe. The ends are bevelled to facilitate this process, and therefore the weldolet is considered a butt-weld fitting. Weldolet (Welding Outlet) is designed to minimize stress concentrations and provide integral reinforcement. manufactured to meet your specific reinforcement requirements.

What is a weldolet (Welding Outlet)?

A Weldolet is commonly known on drawings as a WOL and makes a 90° branch connection. It comes in full size or reducing for a straight piece of pipe. A weldolet is designated by the run length by the branch length. For example a 6-inch weldolet on a 19-inch pipe would be a 19×6 Weldolet. 

Dimensions Weldolet Size on Size -STD- MSS SP97

DIMENSIONS NPS 1/2 TO 24NPSABCD1/23/4 19.051.3/8 34.9315/16 23.815/8 15.883/47/8 22.231.5/8 41.281.3/16 30.1613/16 20.6411.1/16 26.992 50.801.7/16 36.511.1/32 26.191¼1¼ 31.752.3/8 60.31.3/4 44.451.3/8 34.931½1.5/16 33.342.7/8 732 50.801.5/8 41.2821½ 38.103½ 88.902.9/16 65.092.1/16 52.392½1.5/8 41.284.1/16 103.193 76.202.7/16 61.9131.3/4 44.454.13/16 122.243.11/16 93.663.1/16 77.793½2 50.805.3/8 136.533.7/8 98.433.9/16 90.4942 50.806 152.404.3/4 120.654 101.6052¼ 57.157.1/8 180.985.9/16 141.295.1/16 128.5962.3/8 60.38½ 215.906.11/16 169.866.1/16 153.9982.3/4 69.8510.3/8 263.538.11/16 220.667.15/16 201.61103.1/16 77.7912.9/16 319.0910.13/16 274.6410 254.00123.3/8 85.7314.7/8 377.8312.13/16 325.4412 304.80143½ 88.9016.1/8 409.5814.1/16 357.1913¼ 336.55163.11/16 93.6618¼ 463.5516.1/16 407.9915¼ 387.35184.1/16 103.1920.3/4 527.0518.5/8 473.0817¼ 438.15204.5/8 117.4823.1/16 585.7920.1/16 509.5919¼ 488.95245.3/8 136.5327.7/8 708.0325.1/8 638.1823¼ 590.55NPSABCD

General notes:

1. Dimensions: Top Row in Inches / Bottom Row in millimeters.

2. Root Gap – X – “Space” for welding the O’let is raised off the run pipe to establish proper weld gap by placing spacers, e.g. welding rods, under the fitting. This provides a uniform welding gap between the curvature of the run and base of fitting.

3. L = Dimensions Center Line of Run Pipe + X (Root Gap) + A (height of Weldolet).

4. Bevelled Ends ASME B16.9 and B16.25.

5. Source comes from Bonney Forge (except the sizes in millimeters).

6. Weldolet is a registered name. Another often used name is Welding Outlet.