Building materials

Sealing material for metallic threaded joints. Part 1: anaerobic jointing compounds AR 31-1

These requirements are applicable to gas stoppers as independent component or as part for installation in another component, for the application in plastic piping systems for the distribution of natural gas according to the “regeling gaskwaliteit”...

This approval requirement describes the requirements with regard to flexible hose assemblies for use in installations for natural gas with a pressure of no more than 200 mbar in accordance with the NPR 3378-11 Code of Practice

Hydrogen is an interesting substitute to natural gas. Especially since research demonstrates that existing natural gas infrastructures can be made suitable for the distribution of hydrogen relatively easily. Kiwa anticipates with a new approval requirement (AR) 214 "Suitability for hydrogen gas".

The valves are meant as a device to prevent backflow. Check valves with a nominal diameter smaller then or equal 50 mm are intended for application in drinking water installations with a maximum constant temperature of 65°C and a with a maximum of one hour with a water temperature of 90° C.

Rubber engineering products | Testing-inspections-service life

Insulation union couplings in gas conduits AR 154

Socket and transition pieces made of PE for PVC/CPE and copper gas pipes AR 156

Plumbing fittings with ends for capillary soldering, capillary brazing and/ or threaded connections AR 6

Welding is a special manufacturing process which is used in sectors to reveal structures which cannot be manufactured as one piece. The EN ISO 3834 series standards are also standards that define all Quality requirements for the operation of this particular process.

Use the Kiwa Water Mark as a producer or supplier. If you want to market yourself with products that meet all requirements; both functional as well as all legal hygienic requirements specified in the “Materials and chemicals in the supply of drinking water and warm tap water Regulation” by the Dutch government.

The Polyurethane coatings are intended to be applied as an external protection on under­ground ductile iron pipes. Coatings complying with this Guideline can be used for a continuous operating temperature of upto 40 °C in soils of any corrosivenes...

For the construction products for which a harmonized European standard is available the CE marking is mandatory when you want to place them on the European internal market. For the other construction products there is the possibility of applying a...

Kiwa product certificate for internally tinned copper tubes for drinking water installations.

Kiwa certifies materials and finishes used in the manufacturing of food equipment. The certification scheme is based on the standard NSF/ANSI 51.

Based on the Evaluation Guideline for Temporary Drinking Water Installations (BRL-K14036) Kiwa issues certificates to installers who design, construct, operate and manage temporary drinking water installations. Subsequently certified installers ma...

Within the Kiwa organisation there are a large number of accredited laboratories. This means that the scope of possible tests within the entire Kiwa Group is so wide that is impossible to mention them all here. Although not limited to polymer test...

Confidence is what suppliers, buyers, inspectors and consumers need and want. Confidence in the quality of the materials utilized, the performance of the products and the quality control on a day-to-day basis of the manufacturer can all be highlig...

Kiwa makes quality visible As a supplier, buyer, inspector and consumer you need and want confidence. Confidence in the quality of materials and products used in (drinking) water installations and in its manufacturing. Kiwa will make the quality o...

Service life investigations of plastic and rubber products