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Socket Welding  

Socket Welding

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  threaded female ends  

threaded female ends

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  male ends  

male ends

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female union ends  

female union ends

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PP-H Pipe Systems: High Performance and Chemical Resistance

Looking for high-quality PP pipes, fittings, and valves for your piping system? Look no further! We offer a wide range of reliable and durable PP products that are designed to meet your specific requirements.

Our PP pipes are made from superior PP-H (Polypropylene Homopolymer) material, ensuring excellent elasticity and tensile strength. Whether you need socket fusion fittings, butt fusion fittings, or electrofusion fittings, we have you covered. Our PP valves, including ball valves, diaphragm valves, strainers, check valves, and butterfly valves, provide reliable performance and seamless integration into your piping system.

What sets our PP systems apart is their exceptional chemical resistance, mechanical properties, and high thermal stability. With a pressure rating of up to 10 bar and a temperature range of 0°C to +80°C, our PP products are suitable for a wide range of industrial applications. From chemical process industries to wastewater treatment plants, our PP pipes, fittings, and valves offer long-lasting performance and efficient transportation of aggressive chemicals.

At Kwerk GmbH, we understand the importance of easy installation and system modification. Thatís why our PP systems are designed to be easily welded using approved methods such as socket fusion welding, butt fusion welding, and electrofusion welding. With our high-quality PP products and reliable welding processes, you can achieve hassle-free installation and seamless integration into your existing system.

Our PP systems are not only durable and efficient but also environmentally friendly. Made from recyclable materials, they have a minimal impact on the environment. Plus, our PP pipes and fittings require fewer joints, resulting in reduced leakage and lower maintenance costs.

Trus Kwerk GmbH for all your PP pipe, fitting, and valve needs. With our extensive range of products, exceptional quality, and reliable performance, we are your trusted partner in the world of piping solutions.

Contact us today to explore our comprehensive range of PP pipes, fittings, and valves and experience the reliability and durability that our products offer.

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Plastic pipe systems

Overview of plastic pipe systems
Technical information on ABS pipe systems
Technical information on PVC  U pipe systems
Technical information on PVC  U transparent pipe systems
Technical information on PVC  C pipe systems
Technical information on PP pipe systems
Technical information on PP-R pipe systems
Technical information on PE pipe systems
Technical information on PVDF pipe systems

Chemiedur - pipe

Technical information on UP-GF (FRP) pipe systems
UP-GF (FRP) pipes
UP-GF (FRP) molded parts and connection
UP-GF-PP (FRP) molded parts and connection
UP-GF (FRP) adhesive collars
UP-GF (FRP) loose flanges
Pot Strainer DN 200 - DN 500 Inliner PP/FRP Coated
Pot Strainer DN 200 - DN 500 Inliner FRP/CBL Coated
Angle Seat Strainer DN 200 - DN 400 Inliner FRP/CBL Coated
Manhole mad of FRP and PP/FRP

Plastic pipes

Calculator for cutting pipes
Guidelines for sawing plastic pipe
Leftovers in plastic pipe
Standardization of plastic pipes and molded parts
PVC U pipes deviations
Pressure loss in pipe systems out of PVC U, PVC C and ABS pipe systems
Distinction between Rp, R and G threads
Screw lengths for flange connections

Plastic fittings

PVC U transparent ball valves
Diaphragm valves
Block valves
Butterfly valves
Plastic needle valves


Plastic Valves according to ATEX

New EU guideline 2014/34/EU
Plastic Valves in EX zones
Y-Strainers PP-EL DN 15 - DN 50
Check valves PP-EL DN 15 - DN 50
Angle seat valves PP-EL DN 15 - DN 50

Bonding of plastic pipes

Bonding manual
Video showing the bonding of pipes

Plastic welding

Guidelines for extrusion welding

Grids / support grids

GFK grids
Grids out of PP -el electrically conductive
Profile support grids out of PP -el electrically conductive

Molded ventilation parts

Ventilation technology

Chemical hose

PVC transparent hose with fabric inlay

Industrial tanks and chemical containers

Dosing tanks and outer containers 35 – 1000 Liter
Salt dissolving tanks 60 -5000 Liter
Storage tanks and vats
Storage tanks for water
Safety and collecting troughs
Industrial tank delivery program
Dosing tanks with agitator
Dosing tank agitators
Dosing tanks with attachments
Dosing tanks made of sheet material
Customized chemical containers
Dosing tanks with level indicators



IBC screw caps DN 150/DN 200
IBC adapters out of PE
IBC adapters out of PP

Attachment parts for tank construction

Vapor separators
CO2 - absorbes
Revision nozzles
Block flange

Filter housings and filter cartridges

PENTEK 3G Slime Line filter housings
PENTEK 3G Standard filter housings
PENTEK Big Blue filter housings
PENTEK PP high temperature filter housings
PENTEK PP all nature filter housings
PENTEK filter bags for Big Blue filter housings
PENTEK surface filter cartridges
PENTEK filter cartridges for depth filtration
PENTEK filter cartridges with activated carbon
CINTROPUR filter systems
CINTROPUR water filters

Flange configurator

Blind flanges, loose flanges,  rectangular flanges

Chemical resistance

Table of chemical resistance for plastic pipe systems

Machined plastic parts

Screw-in parts
Threaded fittings
Screw fittings

Milled plastic parts

Loose flanges and blind flanges made of sheet material

Static mixers

Static mixers made of plastic


Single-type and double-type strainers
Pot strainer DN 300
Angle seat strainer DN 500

Flow meters

Variable area flow meters
Configuration tool for flow meters

Filter presses

Laboratory filter presses

Injection molded parts

Scraper made of PE for filter press

Kwerk Practice Blog

The Kwerk team blogs from the field here

Partnership at the highest level.