Pipe Weldolet

QS Pipe Fitting: Zhangzhou Pipe Weldolet

Pipe Weldolet to MSS-SP-97 with a reinforced welded branch outlet, in carbon, stainless and alloy grades for 1/2 to 4 Inch outlets.

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One-Minute Overview

Weldolet branch fitting welded directly onto the run pipe.
1/2 to 4 Inch outlets, walls Sch40 to SchXXS, built to MSS-SP-97.
Materials from ASTM A105 to stainless, alloy and duplex grades.
Sizes, schedules and grades are confirmed per inquiry.

A weldolet is a branch connection fitting welded straight onto the run pipe, so the branch inherits a reinforced, full-penetration outlet instead of a plain hole and a stub. This one is built to MSS-SP-97 in the 1/2 to 4 Inch range, with wall options from Sch40 through Sch80, SchXS, Sch160 and SchXXS. The material list runs from ASTM A105 carbon steel through stainless grades F304, F316, F304L and F316L to alloy grades A182 F11, F22, F91 and duplex A182 F51, so the branch can be matched to the run pipe and the service. The smooth, reinforced shape keeps flow losses and erosion low at the junction. Sizes, wall thicknesses and material grades are confirmed per inquiry, and a detailed specification sheet is available on request.

Name: Pipe Weldolet
Size Range: 1/2 to 4 Inch
Wall Thickness: Sch40, Sch80, SchXS, Sch160, SchXXS
Material: ASTM A105, F304, F316, F304L, F316L, A182 F11/F22/F91, A182 F51
Manufacturing Standards: MSS-SP-97
Sizes, wall thicknesses and material grades are confirmed per inquiry, and a detailed specification sheet is available on request.

A weldolet is a branch connection fitting that is welded directly onto the run pipe, so the branch inherits a reinforced, full-penetration outlet instead of a plain hole and a stub. This one is built to MSS-SP-97 in the 1/2 to 4 Inch range, with wall options from Sch40 through Sch80, SchXS, Sch160 and SchXXS. The material list runs from ASTM A105 carbon steel through stainless grades F304, F316, F304L and F316L to alloy grades A182 F11, F22, F91 and duplex A182 F51, so the branch can be matched to the run pipe and the service. Selection starts with the run and branch sizes, the required wall schedule and the material group, then the pressure and temperature of the line.

Installing a weldolet is a two-stage job: prepare the run pipe, then weld on the fitting. Cut and bevel the hole to the outline MSS-SP-97 calls for, align the weldolet saddle to the run curvature, tack it in place and check the branch orientation before the root pass. Weld with controlled heat input so the run pipe does not distort, then join the branch pipe to the bevelled outlet. Inspect the saddle weld and the branch weld, verify the grade stamping and keep the bevels capped until the fitter is ready. Sizes, wall thicknesses and material grades are confirmed per inquiry, so ask for the specification sheet and the material certificate with the order.

FAQ

Q1. Why use a weldolet instead of just welding a branch pipe onto the run?

A plain stub leaves a sharp, unreinforced intersection that concentrates stress and disturbs the flow. A weldolet is shaped to the run curvature and built to MSS-SP-97, so the load spreads into the saddle and the branch gets a prepared, full-penetration outlet. On a pressurised or cyclic line that reinforcement is the difference between a sound joint and a fatigue crack.

Q2. How do I pick the right material from that long list?

Start with the run pipe material and stay in the same family, then adjust for the service. ASTM A105 covers carbon steel duty, the F304 and F316 grades cover corrosive media, and the A182 F11, F22, F91 and F51 grades cover higher temperature, strength or duplex requirements. State the medium and temperature so the grade is chosen for the real duty.

Q3. Is the 1/2 to 4 Inch range the branch size or the run size?

It is the outlet, the branch you are adding, not the diameter of the pipe you weld onto. A weldolet can sit on a much larger run and still take a small branch, which is exactly why it is popular. Give both the run size and the branch size with the inquiry so the saddle curvature and the wall schedule land right.

Q4. How long will production take?

Standard sizes are typically ready within 30 days, and in-stock items ship immediately. Larger or custom orders get a confirmed date per order, because the schedule depends on quantity, material, the bolt pattern you specify, and how busy production is at the moment you order.

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