BS ISO 17885:2015 pdf download – Plastics piping systems — Mechanical fittings for pressure piping systems — Specifications.
5.4 Lubricants and/or greases Lubricants and/or greases may be used to assist in joint assembly. The fitting manufacturer shall provide evidence that the lubricant and/or grease shall not have a deleterious effect on the performance of the component parts of the fitting likely to be in contact or of the connecting piping system. NOTE Requirements for GAS can be found in EN 377. [4] 6 General characteristics 6.1 Appearance When viewed without magnification, the internal and external surfaces of fittings shall be smooth, clean and shall have no scoring, cavities and other surface defects to an extent that would prevent conformity to this International Standard. No component of the fitting shall show any signs of damage, scratches, pitting, bubbles, blisters, inclusions or cracks to an extent that would prevent conformity of the fittings to the requirements of this International Standard. 6.2 Colour The colour shall conform to the requirements given in the relevant product standards. For W applications, plastic body material other than black shall be tested in accordance with ISO 7686, the percentage of light which passes through the wall of the fitting shall be less than or equal to 0,2 %. 6.3 Ultraviolet protection The fitting parts, which are exposed to ultraviolet radiation and affected by ultraviolet radiation, shall be protected against ultraviolet radiation. 6.4 Threads Joints made pressure-tight by the mating of the threads shall conform to ISO 7-1 and fastening pipe threads to ISO 228-1. 6.5 Transition fittings to metal pipes Where a fitting is connected to a metal pipe, the joint shall fulfil at least the performance requirements of the plastic pipe systems. The fitting part connected to the metal pipe shall fulfil the dimensional requirements of the corresponding metal product standards.
8 Physical characteristics 8.1 Evaluation of the MRS value of the plastic material For plastic materials intended to be pressure-bearing and subject to continuous stress, either in hoop or tension, determine the σ LPL value in accordance with ISO 9080. Data provided by the compound manufacturer may be taken into account. Classify the material (MRS) and calculate the design stress in accordance with ISO 12162. NOTE Plastic materials used to manufacture screw caps, clamping rings and supporting rings do not need to be classified.