Petroleum and natural gas industries. Completion fluids and materials - Procedures for measuring the long term conductivity of proppants1 Scope This part of ISO 13503 provides standard testing procedures for evaluating proppants used in hydraulic fracturing and gravel packing operations. NOTE The proppants mentioned henceforth in this part of ISO 13503 refer to sand, ceramic media, resin coated proppants, gravel packing media, and other materials used for hydraulic fracturing and gravel packing operations. The objective of this part of ISO 13503 is to provide consistent methodology

Initial conditions

— intended use b) for specific uses with specific requirements

c) a test currently applicable to hydraulic fluid power filter elements that exhibit an average filtration ratio greater than or equal to 75 for particle sizes ≤ 25 µm(c)

stating that the hardening is usually approximately equivalent to the softening resulting from any solvent residue

BS ISO 4126-9:2008 covers the application and installations of safety devices for the protection of pressure equipment

1 Drop and topple test

such as plastics)

1 Inspection for compliance determination

6 up to and including M64 and product grade A

Access interactive

BS 5809 also covers abnormal situations that can be expected in practice and takes into account the way in which electromagnetic phenomena can affect the safe operation of appliances

Quality specifications for cold coiled compression springs