Outlet fittings are forged products with high strength and clear cost advantages over conventional pipe branching techniques. How are they installed? Quite easily: on one side, the fittings example a Weldolet is fixed onto the run pipe with a full penetration groove weld and, on the other side, welded or screwed on the branch pipe. Of course, the header pipe shall be properly cut in the proximity of the area where the pipe needs to be branched. The MSS-SP 97 specification covers the dimensions, the finishing, the tolerances, the testing methods and procedures, the marking, the material grades, and the minimum tensile strength requirements for degrees integrally reinforced forged branch outlet fittings welded and threaded. A Weldolet has beveled ends at both ends and is, therefore, welded onto the run pipe on one side and onto the branch pipe on the other side.
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In when Bonney Forge pioneered the Shape of Reinforcement for branch connections, who would have thought it would fast become a recognized industry standard. Today, Bonney Forge Branch Connections offer complete run pipe reinforcement while avoiding cracks, fillet welds, and sharp re-entrant corner reinforcement tapering at the sides, thus preventing abrupt changes in thickness where the fitting joins the header pipe.
Bonney Forge Branch Connections have been designed to substantially reduce warehouse inventory. ASME B It is used worldwide in refineries, chemical plants and gas pipelines. This means less warehouse bin locations, fewer individual inventory items, and less time needed for filling orders. Branch Connection forgings also undergo frequent checks against mill documents during the manufacturing process to assure the highest compliance with ASME and ASTM specifications.
Plus, comprehensive record keeping of every fitting from initial forging bar through forging, heat treatment, machining, storage and shipment means every fitting is traceable to the exact material and process used in its manufacture.
Tapered transition from branch to header and thick juncture relieve stress concentrations, and the funneled inlet relieves stress concentrations. Inside not accessible for inspection or backwelding. Short height of welding outlet fitting compared to diameter permits accessibility for inspection or backwelding. Every fitting manufactured is subjected to three separate quality control systems: one for material control, one for manufacturing control, and one for design control.
All forgings are inspected before being passed to the shipping room. Frequent analyses are made to check against mill documents. Accurate records are kept of every fitting, from initial forging bar through forging, heat treatment, machining, storage and shipment. Every single fitting is traceable to the exact material and process used in its manufacture. RESEARCH Rather than blindly following the results of tests on branch connections by others and applying them to the Weldolet, Bonney Forge performed the necessary basic research and applied it directly to the Weldolet and Sweepolet type of construction.
By ultra-precise use of stress coat, monitored by strain gauges, Bonney Forge has obtained the effect of an infinite number of strain gauges.
Starting with unreinforced branch connections, and testing a large number of sizes, size combinations and weights, Bonney Forge scientifically observed and developed patterns of the areas of stress concentrations as well as the areas having less than an average stress. As a result of a continuing program of testing over the years, the Weldolet and the Sweepolet have undergone design revisions to keep pace with the changing needs of the piping industry. The most modern research techniques are used including stress analyses by means of three-dimensional photoelasticity.
The modern Weldolet and Sweepolet provides the best engineered method of fabricating a branch connection of carbon steel, stainless, alloy and high yield transmission pipe, in all pipe wall thicknesses. The Sweepolet is the recommended branch connection for Class I critical service nuclear piping.
Weldolet Welding Fittings are rated the same as seamless steel pipe. Weldolets are designed so that their actual bursting strength when installed as recommended exceeds the computed bursting strength of the pipe of the designated weight or schedule number and material.
Header assemblies with full size and reducing branches constructed with Weldolet welding fittings tested in accordance with the provisions of ASME B Flexolet Buttweld Threaded Socket-weld 3. Stainless Steels Other 5. Example: 16" Standard weight x 6" Standard weight is specified as a 6" standard weight fitting. Where the schedule of the run is greater or less than the schedule of the branch, it is essential that both schedules be specified since a The Weldolets reinforcing characteristics are a function of the run pipe wall thickness, which in turn designates the schedule of the basic Weldolet fitting to be used; b The wall thickness of the outlet or branch end must match the wall thickness of the branch pipe.
Example: 16" Extra strong x 6" Standard weight 16" Standard weight x 6" Extra strong Special care is suggested to avoid confusing schedule 40 and standard weight as being identical above 10" schedule 40 is heavier and schedule 80 and extra strong above 8" schedule 80 is heavier.
Example: 8" Schedule 80 x 4" Schedule 80 fitting or extra strong fitting. Designs for thicknesses greater than these can be developed on request. When run is standard weight and branch size is bored for a schedule less than standard weight - specify and price as standard weight plus special bore. When run size is extra strong weight and the branch is extra strong weight - specify and price as extra strong. When run size is extra strong weight and the branch is bored for a schedule less than extra strong weight - specify as extra strong plus special bore.
When run size is schedule weight and the branch is schedule weight - specify and price as schedule When the run size is schedule weight and the branch is bored for a schedule less than schedule - specify as schedule plus special bore.
For 12" and larger run sizes with wall thicknesses heavier than schedule - specify Heavy Wall Weldolets as shown on page Weight Pounds. Larger outlet sizes available on application. Each outlet size listed is available to fit any run curvature. Larger Outlet Sizes Available on Application. BW ends per B See page 38 for run pipe size combination table s.
Standard weight fittings are the same as schedule 40 fittings through 10". A schedule 40 Weldolet for sizes 12" and larger is available. A flat Weldolet for use on welding caps, elliptical heads and flat surfaces is available. When ordering a Weldolet fitting, see page 7. See footnotes at bottom of page Extra strong fittings are the same as schedule 80 through 8". A schedule 80 Weldolet for sizes 10" and larger is available.
Dimensions and prices on application. Larger sizes available on application. It provides the economical and engineering answer to the problem of welding outlet fittings on high pressure, high temperature piping and pressure vessels.
ASTM A182 F51 Weldolet
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