... class, prime, newly produced, secondary , stock etc. Material/Steel grade A, B, X42, X46, X52, X56, X60 ... Test, Ultrasonic Test) Packing Small sizes packed by steel strips into bundles, big sizes in loose pieces ... or for screwing to BS21 pipe threads, loose steel tubes, scaffolds - used for the conveyance of ... , applies to pipe piles in which the steel cylinder acts as a permanent load-carrying member, ...