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ASTM B668-2019 pdf free download

ASTM B668-2019 pdf free download.Standard Specification for UNS N08028 and N08029 Seamless Pipe and Tube
1. Scope
1.1 This specification covers UNS N08028 and N08029 seamless cold-finished or hot-finished pipe and tube intended for general corrosive service. The general requirements are covered in Specification B829. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. General Requirement
3.1 Material furnished under this specification shall con- form to the applicable requirements of Specification B829 unless otherwise provided herein.
4. Ordering Information
4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for the safe and satisfactory performance of material ordered under this specification. Examples of such requirements include, but are not limited to, the following: 4.1.1 Alloy name or UNS number, 4.1.2 ASTM designation and year of issue, 4.1.3 Dimensions: Outside diameter, minimum or average wall thick- ness (in inches or millimetres, not gage number), and length, Standard pipe size, schedule and length, 4.1.4 Quantity (feet or metres, or number of pieces), 4.1.5 Optional requirements, 4.1.6 Certification—State if certification is required, 4.1.7 Samples for Product (Check) Analysis—State whether samples for product (check) analysis should be furnished, and 4.1.8 Purchaser Inspection—If the purchaser wishes to witness tests or inspection of material at the place of manufacture, the purchase order must so state, indicating which tests or inspections are to be witnessed.
5. Materials and Manufacture
5.1 Pipe and tube shall be furnished in the solution-annealed condition. N OTE 1—The recommended heat treatment for UNS N08028 shall consist of heating the material to a temperature of 1975 to 2100 °F (1080 to 1150 °C) with subsequent quenching in water or rapidly cooling by other means. The recommended heat treatment for UNS N08029 shall consist of heating the material to a minimum temperature of 2000 °F (1100 °C) with subsequent quenching in water or rapidly cooling by other means. 5.2 The scale shall be removed by suitable means. When bright annealed, scale removal operations are not necessary.
6. Chemical Composition
6.1 The material shall conform to the requirement pre- scribed in Table 1. 6.1.1 A chemical analysis shall be made on each lot of material as described in Specification B829. 6.2 If a product (check) analysis is performed by the purchaser, the material shall conform to Table 1 subject to the product (check) analysis variations prescribed in Specification B829.
7. Mechanical Properties and Other Requirements
7.1 The material shall conform to the mechanical properties prescribed in Table 2. One test is required for each lot, as defined in Specification B829. 7.1.1 One tension test shall be made on each lot of pipe or tube. 7.2 Flaring Test—One flaring test shall be made on a specimen from one end of one pipe or tube from each lot of finished tubes. 7.3 Hydrostatic Test or Nondestructive Test: 7.3.1 Each pipe or tube shall be subjected to either the hydrostatic test or the nondestructive electric test at the manufacturer’s option. The purchaser may specify which test is to be used.

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