Chemical analysis of silicon-carbide-containing raw materials and refractory products - Determination of nitrogen, oxygen and metallic and oxidic constituents1 Scope This part of ISO 21068 specifies methods for the determination of total nitrogen and nitrogen calculated as silicon nitride, total oxygen, and free metallic and oxidic components in silicon carbide raw materials and refractory products. It applies only to silicon carbide materials that are not bonded with nitrogen. Nitride bonded silicon carbide refractories are covered in EN 12698 1.

distribution and retailing of:

It is applicable to unleaded petrol for use in petrol engine vehicles designed to run on unleaded petrol

power lines

DD CLC/TS 50539-22:2010 Low-voltage surge protective devices

b) electrical control equipment

determine the self-weight of acoustical elements and assess the dynamic load from snow clearance

— 40 kVA for single-phase transformers

Major components are measured using ISO 6974 (all parts) and the ranges of components that can be measured are as defined in ISO 6974-1

Direction and amount of twist

installers and purchasers of transportable accommodation units

Such products are covered by BS EN 16654

hydrogen stress cracking