1.1 This specification covers a group of requirements which, with the exceptions of 4.3 and Sections 5, 6, 17, 18, 19, 20, 21, 22, and 23, are mandatory requirements to the following ASTM tubular product specifications: Title of Specification ASTM Designation Seamless Low-Carbon and Carbon-Molybdenum Steel Still Tubes for Refinery Service A 161 Electric-Resistance-Welded Carbon Steel and Carbon Manganese Steel Boiler Tubes A 178/A 178M Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes A 179/A 179M Seamless Carbon Steel Boiler Tubes for High-Pressure Service A 192/A 192M Seamless Cold-Drawn IntermediateAlloy-Steel Heat-Exchanger and Condenser Tubes A 199/A 199M Seamless Intermediate Alloy-Steel Still Tubes for RefineryService A 200 Seamless Carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes A 209/A 209M Seamless Medium-Carbon Steel Boiler and Superheater Tubes A 210/A 210M Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes A 213/A 213M Electric-Resistance-Welded Carbon Steel Heat-Exchanger and Condenser Tubes A 214/A 214M Electric-Resistance-Welded Carbon Steel Boiler and Superheater Tubes for High-Pressure Service A 226/A 226M Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes A 249/A 249M Electric-Resistance-Welded Ferritic Alloy-Steel Boiler and Superheater Tubes A 250/A 250M Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service A 268/A 268M Seamless and Welded Austenitic Stainless Steel Tubing for General Service A 269 Seamless and Welded Austenitic Stainless Steel Sanitary Tubing A 270 Seamless Austenitic Chromium-Nickel Steel Still Tubes for Refinery Service A 271 Seamless and Welded Carbon and Alloy-Steel Tubes forLow-Temperature Service A 334/A 334M Seamless and Electric-Welded Low-Alloy Steel Tubes A 423/A 423M Electric-Resistance-Welded Coiled Steel Tubing for Gasand Fuel Oil Lines A 539 Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes A 556/A 556M Electric-Resistance-Welded Carbon Steel Feedwater Heater Tubes A 557/A 557M Welded Austenitic Stainless Steel Feedwater Heater Tubes A 688/A 688M Seamless Medium-Strength Carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes A 692 Austenitic Stainless Steel Tubing for Breeder Reactor Core Components A 771 Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service A 789/A 789M Welded Unannealed Ferritic Stainless Steel Tubing A 791/A 791M Welded Ferritic Stainless Steel Feedwater Heater Tubes A 803/A 803M Seamless, Cold-Drawn Carbon Steel Tubing for Hydrau-lic System Service A 822 Austenitic and Ferritic Stainless Steel Duct Tubes for Breeder Reactor Core Components A 826 High-Frequency Induction Welded, Unannealed Austenitic Steel Condenser Tubes A 851 A These designations refer to the latest issue of the respective specifications. 1.2 One or more of Sections 4.3, 5, 6, 17, 18, 19, 20, 20.1, 22, and 23 apply when the product specification or purchase order has a requirement for the test or analysis described by these sections. 1.3 In case of conflict between a requirement of the product specification and a requirement of this general requirement specification only the requirement of the product specification need be satisfied. 1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the "M" designation (SI) of the product specification is specified in the order.