A-A-52597 Valves, Check: Swing, Cast-Iron And SteelThis CID covers requirements for cast-iron and steel swing check valves, hereinafter referred to as "valves", designed for liquid or gaseous petroleum products.

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A-A-52597

3.2.3.4 End flange bolting. When specified (see 7.2), end flange bolting shall be furnished. Bolts shall have regular square, or heavy hexagonal heads, or may be of the bolt-stud type with dimensions conforming to ANSI B18.2.2. For cast-iron valves, the bolts, bolt-studs, or nuts shall conform to ASTM A307, grade B. For steel valves, the bolts or bolt-studs shall conform to ASTM A449.

3.2.3.5 Threaded ends. Valve ends shall be threaded with internal NPT threads conforming to API SPEC 5B.

3.2.3.6 End-to-end dimensions. End-to-end dimensions shall conform to ANSI B16.10.

3.3 Identification and marking. Identification and marking shall be permanent and legible, and shall include as a minimum, the manufacturer’s identification code (CAGE), the contract number, the part or identifying number (PIN) (see 7.3), and the national stock number (NSN).

3.3.1 Body marking. Body marking shall conform to MSS SP-25.

3.4 Treatment and painting. Unless otherwise specified in contract (see 7.2), the parts of the valve normally painted shall be cleaned, treated, and painted in accordance with the contractor’s commercial practice. When a color choice is standard practice, camouflage green is preferred.

4. REGULATORY REQUIREMENTS.

4.1 Recovered material. The offeror/contractor is encouraged to use recovered materials to the maximum extent practicable, in accordance with paragraph 23.403 of the Federal Acquisition Regulation (FAR).

5. QUALITY ASSURANCE PROVISIONS.

5.1 Responsibility for inspection. The contractor is responsible for the performance of all inspections, examinations, and tests.

5.2 Contractor certification. The contractor shall certify and maintain substantiating evidence that the product offered meets the salient characteristics of this CID, and that the product conforms to the producer’s own drawings, specifications, workmanship standards, and quality assurance practices. Items with known defects shall not be submitted for Government acceptance. The Government reserves the right to require proof of such conformance prior to the first delivery, and thereafter, as may be otherwise provided for under the provisions of the contract.

6. PACKAGING. Preservation, packing, and marking shall be as specified in the contract or order (see 7.2).