Every butt weld branch fitting answers the same question — how to take a line off a header — with a different construction. A tee answers it with a complete fitting inserted in the run. A saddle answers it from outside the run: the saddle's foot is profiled to the header's outside diameter, a hole is cut in the header wall inside the foot's outline, and the saddle is welded around its contour and at the branch. The run pipe is never cut in two.
Saddles belong to the butt weld family, not the forged family: they are formed and welded pieces in the pipe's own material logic, sized by the run and branch they join. The forged family's branch form — the integrally reinforced outlet — is a different product, covered on the branch outlet page.
| Item | Range / Options |
|---|---|
| Types | Butt weld saddles — named in the supplier's official classification of butt weld fitting types |
| Standards | Confirmed per product at enquiry — state the pattern your specification calls up |
| Run / branch sizes | Confirmed per product at enquiry — state both the run size and the branch size, with both walls |
| Branch angle | Confirmed per product at enquiry — state the branch angle your layout requires |
| Materials | Confirmed per product at enquiry — the saddle is normally specified in the run pipe's grade family |
| Ends | Branch end bevelled for butt welding; the base is contoured to the run pipe outside diameter |
How a Saddle Works
The saddle's defining feature is its foot. Instead of a flat base, the foot is cut to the saddle curve — the intersection line of the branch cylinder with the run cylinder — so it sits flush on the header with a weldable edge all round. The branch bore is opened through the header wall inside that footprint. Because the fitting adds its metal on the outside of the run, the branch can be placed where the layout needs it, at the size the layout needs, without the run being broken into fitting lengths.
Saddle, Tee or Outlet?
A tee is the full-strength default when the line is being built and the run can be cut: the branch is part of a pressure fitting with three bevelled ends. A saddle serves branches added to a header that stays in one piece, and lighter branch duties where a tee's full fitting is more than the joint requires. A forged branch outlet carries its reinforcement inside an integral forging to MSS SP-97 logic and is specified by class; a saddle is a butt weld piece specified by run, branch and wall. The drawing decides which of the three a given branch is — state the construction it shows on the enquiry.
Specifying a Saddle
A saddle is defined by the run it sits on as much as by the branch it carries: run size and wall (which fix the foot's contour), branch size and wall (which fix the branch bore and bevel), the branch angle, and the material grade. A saddle contoured for one run diameter does not sit correctly on another, so both sizes are essential information, not detail.
Where Saddles Are Used
Header branches in water, air and utility systems, distribution manifolds, and plant lines where branches are numerous, unequal in size, or positioned by layout rather than by a fitting schedule — the cases where cutting a tee into the run for every branch would multiply welds without improving the joint.
Frequently Asked Questions
Do you supply butt weld saddles?
Butt weld saddles are named in the supplier's official classification of butt weld fitting types. Name the run and branch sizes, both walls and the grade on your enquiry, and the execution will be assessed for the specific product before order.
What is the difference between a saddle and a reinforcing pad?
A reinforcing pad is a flat or contoured plate added around a branch that is made by welding a pipe stub straight onto the header — the pad reinforces someone else's branch. A saddle is the branch fitting itself: its contoured foot and branch neck are one piece, bevelled ready for the branch weld.
How is the branch angle of a saddle specified?
The branch angle is part of the product definition, and no angle is stated for a saddle execution in the catalogue records referenced on this site. State the angle your layout requires on the enquiry and it will be assessed for the specific product before order.
Does the saddle have to match the run pipe grade?
The saddle is welded to the run pipe and carries the branch pressure boundary, so it is normally specified in the run pipe's grade family. The grade for a specific product is confirmed at enquiry — state the run pipe grade with the sizes.
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Send Your Specification
Tell us the size, schedule or pressure class, material grade and quantity for the butt weld saddles you need. MOQ and lead time are confirmed in the quotation for your exact specification.