International Pipeline Structural Solutions Stock a wide range of Nipoflanges and Weldolet / Weldoflanges from quality approved European forgings to an array of industry standards as well as accommodating client specific designs.

Weldoflange and Nipoflanges are a combination of a Welding Neck flange and a supposedly Weldolet or Nipolet fitting, the 2 components are manufactured in one piece, and not welded.

Available SizesBranch Sizes from 1/2″ through to 12″ Header / Nominal Pipe sizes from 1″ to Flat Bespoke Sizes available on request.
Dimensions & Pressure RatingAll fittings are designed in accordance with ASME B31.3 / ASME B16.5 unless otherwise specified.
Rating from 150lb through to 2500lb
Available FacingRaised Face, Ring Type Joint Large Tongue & Groove, Small Tongue & Groove
BS4504 – PN6, 10, 16, 25 & 64 BS10 – Table D, E, F & H
StainlessA182 F304/L/H, F310/H, F316/L/H, F321/H, F347/H, F410, F440, 904L
CarbonCarbon Steel – A105, C22.8 Low Temperature Steel A350, LF2, LF3, LF6
Alloy SteelAlloy Steel – A182 F1, F5, F9, F11, F12, F22, F91 High Yield A694, F42, F52, F60, F65, F70
Duplex & Super DuplexA182 F51, F44, UNS S32760
Nickel Alloys200, 400, 600, 625, 800, 825
Unusual GradesBronze, Brass, Copper, Cupro Nickel, Titanium