Flanges

Stainless and Carbon steel Flanges
Long Weld Neck Flanges
Kerkau Manufacturing inventories an entire line of Carbon and Stainless Steel ASME B16.5 pipe flanges. Inventory includes many hard to find items such as RTJ faces, high pressure flanges, reducing and expanding flanges, unpainted and special coated flanges. Kerkau also keeps in house high hub solids for sale or for quick turnaround of custom machining.
A350 Flanges
Kerkau manufactures and stocks Long Weld Neck fittings & flanges in both carbon and stainless steel. The typical length stocked is 9'' and 12'' and can be machined to shorter lengths with a quick turnaround. Kerkau can also quote lengths beyond 12'' upon request.
Hot Dipped Galvanized

A350 LF2 is a carbon steel fitting material, very similar to A105, that is used in general industrial applications and can withstand continuous service down to -46F. This material is supplied in a normalized condition and the Charpy V-Notch tested at -50F.
The Charpy testing is used to reveal a materials natural ductile to brittle transition as temperature decreases. A test sample is brought down to temperature, notched and then struck by a pendulum device. The device measures the amount of energy absorbed by the material until failure occurs
Orifices
Orifice flange unions are used in conjunction with orifice meters to measure the flow of liquids and gases using tapped or socket weld style meter connections located on the outside diameter of the flanges.
Kerkau orifice unions come complete with gaskets, nuts, bolts and jack screws and are made to B16.36 specifications.
Kerkau can also manufacture orifice unions to custom specifications.
Hot dip galvanizing (HDG) is a process in which steel flanges are submerged in molten zinc at a temperature of 850F. During this process, the molten zinc reacts with the steel to form thin layers of zinc alloys. These layers form a barrier that can provide exceptional corrosion protection compared to more traditional methods. This helps to increase the life and productivity of each flange.
Kerkau hot dip galvanized flanges and fittings come with extra deep stamping for ease of identification. All threading is done after galvanizing to ensure quality of threads.
Paddle/Spectacle Blinds
Kerkau offers a variety of sizes of A516 Gr. 70 carbon steel and A240 stainless steel 304L & 316L line blanks manufactured to ASME B16.48. Stock sizes range from .5” to 12”, 150#, 300#, 600#, 900#, 1500# and 2500# pressure classes, with milled or serrated face. Line blanks are offered in the following designs; Spectacle Blinds, Paddle Blanks or Paddle Spacers and Singles. We offer Line Blanks with flat face, ring type joint ( RTJ Male and Female ) face as well as Raised Face and Tongue and Groove. Kerkau can also offer custom line blanks made to customer prints or specific dimensions, along with an array of exotic materials.