Tubes en polyoléfines pour le transport des fluides — Détermination de la résistance à la propagatio...
Le présent document spécifie une méthode de détermination de la résistance des tubes en polyoléfine à la propagation lente d’une fissure, exprimée en fonction du temps à la rupture, lors d’un essai de pression hydrostatique sur un tube entaillé longitudinalement par usinage sur sa surface extérieure. L’essai est applicable aux tubes ayant une épaisseur de paroi supérieure à 5 mm.
Polyolefin pipes for the conveyance of fluids — Determination of resistance to crack propagation — T...
This document specifies a test method for determining the resistance to slow crack growth of polyolefin pipes, expressed in terms of time to failure in a hydrostatic pressure test on a pipe with machined longitudinal notches in the outside surface. The test is applicable to pipes of wall thickness greater than 5 mm.
This document specifies requirements for steel fasteners with electroplated coatings and coating systems. The requirements related to dimensional properties also apply to fasteners made of copper or copper alloys.
It also specifies requirements and gives recommendations to minimize the risk of hydrogen embrittlement, see 4.4 and Annex B.
It mainly applies to fasteners with zinc and zinc alloy…
Fixations — Systèmes de revêtements électrolytiques
Le présent document spécifie les exigences pour les fixations en acier avec revêtements et systèmes de revêtements électrolytiques. Les exigences relatives aux caractéristiques dimensionnelles s'appliquent également aux fixations en cuivre ou en alliages de cuivre.
Il spécifie également les exigences et donne des recommandations afin de minimiser le risque de fragilisation par l'…
This document specifies requirements for non-alloy and alloy steels that are intended for cold heading or cold extruding and are delivered as wire rods, wire or bars. It also contains specific requirements for:
— steels not intended for heat treatment, with diameters from 2 mm to 100 mm (see Annex A);
— case-hardening steels with diameters from 2 mm to 100 mm (see Annex B);
— steels for…
Health informatics — Categorial structure for representation of traditional Chinese medicine clinica...
This document specifies the categorial structure within the field of traditional Chinese medicine clinical decision support system by defining a set of domain constraints of sanctioned characteristics, each composed of a relationship and an applicable information model.
This document is not applicable to Western medicine and Japanese Kampo medicine. It is not applicable to the design and…
Mechanical pencils for technical drawings — Part 2: Black leads — Classification and dimensions
This document specifies a classification and dimensions for black leads used for mechanical pencils for technical drawings.
Two types of black leads are available:
— polymer leads (designated by the letter “P”);
— ceramic leads (designated by the letter “C”).
Plastics — Polyols for use in the production of polyurethanes — Determination of basicity
This document specifies a method for the measurement of trace amounts of basic materials present in polyether polyols used in the production of polyurethanes. It is important to know the trace amount of basicity in a polyol to prevent gelation of the reaction mass during the production of polyurethane prepolymers. It is also useful to control the basicity in polyols used for polyurethane…
