Naylor - Chemically Resistant Ceramics

Naylor is one of the world's leading manufacturers of chemically resistant ceramics, with experience spanning back over a century. Naylor has developed a comprehensive range of products to address the problem of discharges too hot and too corrosive for conventional drainage systems.

The company's range of specialist drainage products covers the most aggressive of discharges and extreme conditions. Also, the company provides solutions displaying resistance to thermal shock, a phenomenon commonly encountered within the process industries where extremes of temperature variation can put significant structural strains on a drainage system.

INDUSTRIAL CERAMICS

Naylor Hathernware offers the pharmaceutical and process industries the most comprehensive range of ceramic products available from any single supplier. In addition to the unrivalled range of drainage systems capable of handling a variety of conditions from domestic sewage to the most aggressive trade effluents, the company produces and supplies industrial ceramic components for use in the processing of aggressive liquids and gases.

The most commonly produced items are Towers, Liquid Distributors, Support Beds, Packings, Bricks and Pavers, Vessel Linings, Nutsche Filters, Grinding Jars and Ball Mills. Other products can be considered upon request.

FULL CHEMICAL RESISTANCE (FCR) PIPES

The corrosion of pipe materials due to chemical attack is a common difficulty in industrial drainage. Whilst traditional vitrified clay systems offer high levels of resistance to many household chemicals, with regards to the industrial arena, both the level of likely attack and the consequences of failure increase.

The Naylor Hathernware FCR system has been developed over 50 years to provide the best solution for aggressive chemical discharges in industry applications. With a proven resistance to over 90% of common industrial effluent products, many designers will find that this FCR offers a safe transport system from plant to treatment centre.

FCR is based on a fully chemically resistant clay material, first used in industrial process vehicles, so the drainage system can often cope with highly corrosive chemicals in process concentrations to cover many people's worst-case scenario. The Naylor technical advisors can assist in material capability and selection for all industrial projects.

CHEMICAL COUPLINGS

Elastomeric sleeve: manufactured in high-grade EPDM or Nitrile elastomers (depending on ground conditions) conforming to EN681-1.

Clamping bands: manufactured in a high corrosion-resistant austenitic stainless steel to EN10088. Where external contamination demands a higher quality stainless, this can be supplied to order.

Fluoropolymer liner:A one-piece seamless FEP element located within the elastomeric sleeve. Expanded PTFE secondary seals ensure a leak-tight joint between the FEP and the pipe. For the best results and to ensure a close fit between the liner and the pipe, the FEP liner is heat shrunk onsite. The liner and seal are chemically inert and resistant to virtually all chemicals, including solvents.

HT THERMAL SHOCK AND FULL CHEMICAL RESISTANCE

By far the biggest single threat to ceramic pipes in the process industry is high temperature. Whilst traditional vitrified clay pipelines can withstand quite high, constant temperatures, if the pipeline is regularly subjected to a rapid change in temperature from ambient to hot or vice-versa, then the ceramic body can quickly be destroyed by the phenomenon known as Thermal Shock.

Thermal Shock occurs when the thermal expansion of a material overcomes the forces holding that material together. Traditional ceramics have a very high susceptibility to Thermal Shock.

The Naylor Hathernware HT pipe body, however, has been further refined from our FCR material. The addition of certain compounds and very careful blending have enabled Naylor Hathernware to produce a pipe body of high structural strength (equal to traditional vitrified clay), very high chemical reistance (equal to FCR clay) and resistant to Thermal Shock at temperature changes of up to 120°C.

This makes Hathernware HT the only ceramic material suitable for use in areas subjected to intermittent discharges of high temperature effluents, such as hospital sterilisation suites, boiler blow down drains, laboratory, food processing and beverage production drainage systems.