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Custom Fabrication

A customized solution designed to meet the unique requirements of your project.

Fish Ladder, KRAHUSA, Oregon USA Manufacturer of HDPE Pipe

True Custom

Our custom HDPE fabrications are the epitome of innovation and efficiency. Crafted with precision and expertise, these tailored solutions offer a myriad of advantages. Their high-density polyethylene construction ensures exceptional durability, corrosion resistance, and longevity, making them ideal for demanding industrial environments. These custom fabrications are not only cost-effective but also eco-friendly, as they reduce the need for frequent replacements and can be recycled. With their versatility and precision engineering, our HDPE fabrications provide reliable, long-lasting solutions for diverse infrastructure needs, ensuring you get the best in quality and performance. Choose our custom HDPE fabrications for a sustainable, efficient, and cost-saving solution to your infrastructure requirements.


Manholes are vital for regular pipe system inspection and maintenance, typically positioned at bends, reducers, or branches. Krah manholes are crafted from the same resin used for the pipes and connected with similar jointing techniques, adhering to international standards for various loads. They offer a homogeneous system and are ideally produced using Krah structured wall types like CPR and VW, promoting efficient settling of soil around their smooth outer surface. Two manhole types, centric and tangential, are selected based on pipe dimensions, offering easy installation and low space requirements. Krah manholes assure sustainability, flexibility, lightweight design, inspection-friendly surfaces, and long-lasting durability with a 100-year service life.


Krah pipes are available in a comprehensive range of diameters and stiffness classes, and they offer a full array of complementary components such as fittings and manholes. This versatility enables the creation of a seamless and dependable pipe system to fulfill diverse project requirements.

Fittings are typically constructed from either VW (solid wall) or CPR (closed profile) pipes. These fittings are custom-designed to match the specified stiffness requirements while considering welding factors. They are versatile, accommodating various pipe ends and seamlessly integrating with the existing pipe system using the appropriate jointing techniques.


The dimensions of all pipe ends adhere to international ASTM standards (ASTM F 894) ensuring compliance with minimum lengths and stiffness criteria. Fittings are crafted from Krah pipes with the necessary stiffness and wall structure, maintaining consistency with the specified requirements.

Branch, KRAHUSA, Oregon USA Manufacturer of HDPE Pipe


Branches can be custom-made and supplied in a wide array of types and shapes, with the angle being individually adjustable, ranging from 15° to 90°, along with the flexibility to tailor the ends and segment lengths according to specific requirements

Flange, KRAHUSA, Oregon USA Manufacturer of HDPE Pipe


To establish a leak-free connection between Krah pipes and concrete structures, such as water treatment plants or concrete shafts/manholes, Krah puddle flanges offer a reliable solution. These puddle flange fittings can be seamlessly integrated into the concrete wall, including the option for an integrated electrofusion bell.

Bend, KRAHUSA, Oregon USA Manufacturer of HDPE Pipe


Bends can be crafted and segmented at various angles, and the bend radius in relation to the pipe diameter can be chosen independently. While the table lists standard bend angles in accordance with DIN 16961, any other dimensions are also feasible, and virtually any angle can be produced to suit specific project needs.

Reducer, KRAHUSA, Oregon USA Manufacturer of HDPE Pipe


Reducers can be produced with both centric and eccentric configurations, ensuring they align with all technical specifications. Krah pipe-based reducers can be custom-crafted to accommodate specific angles and desired diameter variations as per project requirements.

Krah's production technology employs a helical extrusion (spiral wound) process capable of crafting profiled pipes for gravity applications, solid-wall pressure pipes, and a wide array of special wall structures, including fittings, manholes, and accessories. Thanks to this advanced technology and ongoing development efforts, Krah Pipes can manufacture seamless, smooth pipes with inspection-friendly inner surfaces. These pipes also feature an integrated socket spigot for electrofusion jointing, and they can accommodate various other joining technologies. This production method offers the flexibility for tailoring cost-efficient pipe designs, especially suited to the specific application, through custom-designed wall structures.


The pipe system can meet the requirements for standard pipes as well as customized (engineered) pipe systems.

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