ASME SA-513:2021 pdf free download – SPECIFICATION FOR ELECTRIC-RESISTANCE-WELDEDCARBON AND ALLOY STEEL MECHANICAL TUBING
6.Heat Analysis
6.1 An analysis of each heat of steel shall be made bythe steel manufacturer to determine the percentages ofthe elements specified; if secondary melting processes areemployed, the heat analysis shall be obtained from oneremelted ingot or the product of one remelted ingot ofeach primary melt.The heat analysis shall conform to therequirements specified, except that where the heat identityhas not been maintained or where the analysis is not suffi-ciently complete to permit conformance to be determined,the chemical composition determined from a product analy-sis made by the tubular manufacturer shall conform to therequirements specified for heat analysis. When requestedin the order or contract, a report of such analysis shall befurnished to the purchaser.
7. Product Analysis
7.1When requested on the purchase order,a productanalysis shall be made by the supplier.The number andsource of samples for such product analysis shall be basedon the individual heat or lot identity of one of the followingforms of material:
7.1.1 Heat ldentity Maintained One product analy-sis per heat shall be made on either the flat-rolled stockor tube.
7.1.2 Heat ldentity Not Maintained —A product fromone tube per 2000 ft(610 m) or less for sizes over 3 in.(76.2 mm), and one tube per 5000 ft (150 m) or less forsizes 3 in. and under.
7.2Samples for product analysis except for spectro-chemical analysis shall be taken in accordance with Prac-tice E 1806.The composition thus determined shallcorrespond to the requirements of Tables 1-3.
7.3If the original test for product analysis fails, retestsof two additional lengths of flat-rolled stock or tubes shallbe made. Both retests for the elements in question shallmeet the requirements of the specification; otherwise,allremaining material in the heat or lot shall be rejected or,at the option of the producer，each length of flat-rolledstock or tube may be individually tested for acceptance.Lengths of flat-rolled stock or tubes which do not meetthe requirements of the specification shall be rejected.
and“as welded and annealed” tubing made from hot-olled steel shall not exceed the amounts prescribed in Table 4. Permissible variations in outside diameter for tubing that has been sink drawn for closer tolerance on outside diame- ter are shown in Table 5. Permissible variations in wall thickness for tubing that has been sink-drawn for closer tolerances on outside diameters are +10% of the nominal wall or +0.010 in. (0.25 mm), whichever is greater. Permis- sible variations in wall thickness for tubing made from hot- rolled steel are shown in Table 6. Permissible variation in outside and inside diameter for tubing made from hot- rolled steel that has been mandrel drawn for closer toler- ances are shown in Table 5 with wall tolerances shown in Table 7.
8.2 Diameter and Wall Thickness (Cold-Rolled Steel)–
Variations in outside diameter and inside diameter of“as- welded” and“as-welded and annealed” tubing made from cold-rolld steel are shown in Table 8. Outside diameter tolerances for cold-rolled steel tubing, sink drawn and man- drel drawn, are shown in Table 5. Wall thickness tolerances for “as-welded” tubing made from cold-rolled steel are shown in Table 9. Permissible variations in wall thickness for round tubing, mandrel drawn for closer tolerances, are shown in Table 7. Permissible variations in wall thickness for tubing that has been sink drawn for closer tolerances on outside diameter are +10% of the nominal wall or +0.010 in. (0.25 mm), whichever is greater.
8.3 Length (Hot- and Cold- Rolled Steel) – –
Mechanical tubing is commonly furnished in mill lengths 5 ft (1.5 m) and over. Definite cut lengths are furmished when specified by the purchaser. Tolerances for definite cut lengths round tubing shall be as given in Tables 10 and 11. 8.4 Squareness of Cut (Hot- and Cold-Rolled Steel) 一 When specified, tolerance for squareness of cut of round tubing shall be as given in Table 12.