Pipe basic terminology

common terminology
delivery status
products delivered the final plastic deformation or the final heat treatment of state . Like without heat treatment delivery that hot-rolled or cold drawn (rolled) or manufactured state; said heat treatment after heat treatment delivery status, or according to the type of heat treatment that normalized (normalization), quenching and tempering, solution annealing state. When ordering, delivery status specified in the contract.
2. The actual weight of the delivery or delivery by the weight of theory
actual weight - the time of delivery, the product weight by weighing (weighing) the weight of delivery;
theoretical weight - Delivery the weight of their products, said the size calculated from the weight of steel public. Calculated as follows (according to theoretical weight delivery requirements to be specified in the contract):
steel pipe per meter, the theoretical weight (the density of steel for 7.85kg/dm3) formula: W = 0.02466 (DS) S
where: W - steel per meter theory weight, kg / m;
D - steel pipes of nominal outside diameter, mm;
S - steel pipe nominal wall thickness, mm.
Guarantee the conditions
according to the provisions of the current standards projects to test and ensure that the provisions of the standard, called the guarantee conditions. The guarantee conditions are divided into:
A, the basic guarantee for the condition (also known as a necessary condition). Regardless of whether the customer specified in the contract. Need to be carried out in accordance with the standard provisions of the survey, and to ensure that test results meet the standard requirements.
Process performance, such as chemical composition, mechanical properties, dimensional deviation and surface quality, as well as crack detection, hydrostatic test, or flattening or flaring and other experiments are a necessary condition.
B, the agreement to ensure conditions: standard, in addition to the basic guarantee for the condition, there are "demand-side requirements, negotiated by supply and demand, and in the contract note