scope:

This standard provides technical and quality assurance guidelines for the fabrication, welding, and installation of stainless chromium-nickel steel and nickel-alloy roll-bonded and explosion-bonded clad plate conforming to ASTM(footnote 1)A 264 or A 265 in air pollution control equipment. Included are flue gas desulfurization (FGD) absorbers, ducts, stacks, and other process equipment. It is intended to be the basis for preparation of a specification to be agreed on by con- tracting parties.

For the purposes of this standard, the term alloy is used to describe either the stainless chromium-nickel steel or nickel-alloy portion of the clad-steel plate as well as the equivalent solid stainless chromium-nickel steel or nickel- alloy material.

It is the responsibility of users of this standard to deter- mine the suitability of the construction materials specified for particular applications.

This standard is only applicable to materials that con- form to the following standards or to comparable material specifications as agreed on by contracting parties. In all cases, the latest revision of the standard shall be used: ASTM A 264, ASTM A 265, AWS(footnote 2) A 5.1, AWS A 5.4, AWS A 5.9, AWS A 5.11, AWS A 5.14, AWS A 5.17, AWS A 5.18, AWS A5.20, AWS A5.22.

General, commercial, and safety conditions are beyond the scope of this standard. It is assumed that users will establish these specifications in accordance with their indiv- idual requirements.

The following codes and specifications may be useful in the development of a specification for the installation of clad plate for air pollution control and other process equip- ment that supplements this standard.

• ASME(footnote 3) Boiler and Pressure Vessel Code: Section II, Parts A, B, C, and D; and Section IX

• ASNT(footnote 4) SNT-TC-1A

• ASTM specifications for various metals and alloys

• AWS specifications for testing procedures (AWS B 1.10, AWS B 2.1

• Applicable IS0,(footnote 5) European, and regional standards and regulatory documents

This standard recommends fabrication Drocedures incorporating complete joint-penetration welds. Alternative construction techniques, such as partial-penetration welds covered b batten strips in accordance with NACE Standard RP0292, are not addressed in this standard.

New and improved welding techniques as well as new alloys are being developed. References to specific weld designs and techniques in this standard are not intended to preclude the use of newer technology. The use of alter- native methods should be mutually agreed on by all con- trading parties.

For the purposes of this standard, ASME material specifications may be used in place of ASTM material specifications.

Footnote 1 - ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19248-2959.

Footnote 2 - American Welding Society (AWS), 550 NW LeJeune Road, Miami, FL 33135.

Footnote 3 - American Society of Mechanical Engineers (ASME), Three Park Avenue, New York, NY 10016-5900.

Footnote 4 - American Society for Nondestructive Testing (ASNT), 4153 Arlingate Plaza, Columbus, OH 43228-1518.

Footnote 5 - International Organization for Standardization (ISO), 1 rue de varembe, Case Postale 56, CH-1 121 Geneve 20, Switzerland.