BS ISO 16132:2016 pdf download – Ductile iron pipes and fittings — Seal coats for cement mortar linings
4 Performance test requirements
4.1 Short-term sealing efficiency When tested in accordance with Annex A, the pH of the test water shall not exceed 9,5. By agreement between the manufacturer of the product and the customer, other performance tests with other exposure periods, test waters and/or limits of pH value may be undertaken to suit particular national or customer requirements.
4.2 Long-term sealing efficiency When tested in accordance with Annex B, the pH of the test water shall not exceed 9,5 for each of the test samples. By agreement between the manufacturer of the product and the customer, other performance tests with other exposure periods, test waters and/or limits of pH value may be undertaken to suit particular national or customer requirements. Note that if the seal coat has been documented by the manufacturer to a National Standard and successfully used for a minimum of 5 years, the performance of the type test in accordance with Annex B is only required for significant changes in the coating material, type or formulation which could adversely affect the performance of the seal coat.
4.3 Cyclic pressure When tested in accordance with Annex C, visual inspection shall display no peeling of the seal coat or cracking with a width in excess of 0,8 mm. It is permissible to have some precipitation of white alkaline deposit. At the conclusion of the visual inspection, the pipe samples shall immediately be tested for sealing efficiency in accordance with Annex A. When tested in accordance with Annex A, the pH of the test water shall not exceed 9,5 in either of the pipe samples. Note that if the seal coat has been tested and successfully used for a minimum of 10 years, the performance of the type test in accordance with Annex C is only required for significant changes in the coating material, type, or formulation which could adversely affect the performance of the seal coat.
5 Routine test requirements 5.1 General Coating and re-work procedures (e.g. drying regimes for solvent-based coatings and mixing and curing regimes for multi-component materials) shall be defined by the manufacturer of the product in agreement with the seal coat supplier, if necessary, so as to enable the product to conform to the requirements of this International Standard. The tests specified in 5.2 to 5.4 shall be carried out on factory seal coated pipes or fittings as opposed to separately prepared samples. Sampling plans for the tests specified in 5.2 to 5.4, specific to the seal coating material used, the size of the batch and the storage conditions, shall be specified by the manufacturer of the product for each batch of product. Where a non-conforming product is identified, the product shall either be re-worked, so that it meets the requirements of this International Standard, or be rejected.
5.2 Visual appearance When examined visually, the seal coat shall be free from any coating irregularities likely to be detrimental to the performance of the seal coat (as required by the performance tests in this International Standard). The manufacturer shall define those coating irregularities (e.g. hairline cracks or pinholes) which are considered not to be detrimental to the performance of the seal coat (as required by the performance tests in this International Standard), taking into account the nature of the seal coat material.
5.3 Coating thickness When tested in accordance with Annex D or any appropriate method defined in ISO 2808, the wet or dry coating thickness shall be within the limits specified by the manufacturer of the product in conjunction with the seal coat supplier, if necessary.
5.4 Adhesion When tested in accordance with Annex E, one of the following requirements shall be met: — where a cross cut is made in the seal coat, the adhesive strength shall fall within the range of 1 to 3; — where no cross cut is used, the area of disbonded coating shall be less than 10 % of the test area. Any area damaged during testing shall be repaired in accordance with a procedure defined by the manufacturer of the product in agreement with the seal coat supplier.
6 Marking Each seal coated pipe or fitting shall be identified with the pipe manufacturer’s name or mark. In addition, seal coated pipes shall be indelibly and legibly marked on the external surface with the number and year of this International Standard. Where pipes are bundled, the required markings may be applied to the bundle rather than to individual pipes.BS ISO 16132 pdf download.