The testing of tubing is divided between acceptance testing and periodic testing, and performed on a lot by lot basis. Typically a lot is defined as one size and wall thickness of tubing annealed in the same charge (batch annealing) or all tubing of one size and heat annealed at the furnace control temperature, atmosphere and time without interruption (in a continuous furnace). Additional testing may be required indirectly by referenced specifications, details of which might not be expanded upon in the particular production specification. If you have any questions or comments, click here and let us know today!