Precision-Engineered Solutions

Products

High-Performance 

Flanges

Kerkau has been manufacturing flanges for over 35 years. We offer an entire line of pipe flanges in both carbon and stainless steel.

Stainless and Carbon steel 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.

Long Weld Neck Flanges

Kerkau manufactures and stocks Long Weld Neck 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.

A350 Flanges

A350 LF2 is a carbon steel 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 is 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.

Hot Dipped Galvanized
Hot dipped 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 dipped galvanized flanges come with extra deep stamping for ease of identification. All threading is done after galvanizing to ensure quality of threads.
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.

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 faces 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.

Precision Engineering,
Built for the Toughest Standards

Specialized Solutions

Expanded Capabilities

Bleed Rings

Kerkau manufactures a range of Carbon and Stainless Steel Bleed Rings, available in .5″ or .75″ Socket Weld or Threaded Side Taps, with custom tapping options. Standard materials include A516 Gr70 and A240 Stainless Steel, with additional alloys offered upon request. Each bleed ring manufactured to ASME B16.5, ASME B16.20, and ASME B16.48 dimensions, ensuring quality and durability.

Waterjet

Kerkau’s state-of-the-art waterjet cutting offers precision and versatility, delivering clean cuts on a wide range of materials without compromising structural integrity. Our waterjet technology enables intricate designs and accurate cuts, meeting the needs of custom projects with ease. From prototyping to large-scale production, Kerkau’s waterjet services ensure exceptional quality and efficiency.

Unique Specifications

Custom Machining

Kerkau’s experience working with solar energy, defense, petrochemical and water industries has helped us grow into a leading manufacture of precision machined products.

Kerkau Manufacturing has the capability to machine a wide variety of materials including aluminum, copper, stainless steel, carbon steel and castings. Our computer numerically controlled machines turn, bore, drill, ream, tap, mill and contour parts to design.

  • Spectacle Blinds
  • Expander Weld Necks
  • Stub Ends
  • Bleed Rings
  • Plate Flanges
  • Heat Exchanger
  • High Nickel Alloys
  • Plastics

Send us your 2D or 3D drawings and we would be happy to quote your part needs.