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ASME AG-1A-2009 pdf download

ASME AG-1A-2009 pdf download.Addenda to ASME AG-1–2009 Code on Nuclear Air and Gas Treatment.
SA-4100 GENERAL Ductwork and ductwork supports shall be designed in accordance with the requirements of Article AA- 4000 and this section. SA-4200 DESIGN CRITERIA SA-4210 LOAD CRITERIA SA-4211 Ductwork Loads The following loads and load definitions shall be considered: (a) Additional Dynamic Loads (ADL), Deadweight (DW), Design Pressure Differential (DPD), Design Wind (W), External Loads (EL), Normal Operating Pressure Differential (NOPD), and System Operational Pressure Transient (SOPT) as defined in AA-4211. (b) Constraints of Free End Displacement Load (T). These are loads caused by thermal movements. When duct construction utilizes gasketed companion angle construction, effects of (T) for normal operations may be ignored. For postulated accident conditions, a review of the effect of (T) is necessary. (c) Fluid Momentum Load (FML). This is as defined in AA-4211 with the following clarification
(d) Live Load (L). Live loads shall be defined in the design specification (SA-4600). The live load shall not be less than a construction manload of 250 lb (113.4 kg). The load shall be applied at the mid-span of the duct, or midpoint of a stiffener, or within a panel. When applied to a panel, the load shall be assumed to be distributed over 10 in. 2 (64.5 cm 2 ). (e) Normal Operating Pressure Differential (NOPD). This is as defined in para. AA-4211 with the following clarification: For ease of design, a duct system may be designed using one pressure value that envelops NOPD and SOPT (para. AA-4211). NOPD and SOPT may be positive or negative pressures. Worst case shall be considered in design. (f) Seismic Loads (SL). Loads that are the result of the envelope of the operating basis earthquake (OBE) and the safe shutdown earthquake (SSE). As overall system functionalism is not generally compromised by loads from the OBE, the SSE will govern the design. As an option, the OBE and SSE may be considered separately with the OBE loads used for the Level B load combination. The horizontal and vertical components of the seismic excitation shall be applied simultaneously in the direction that will produce worst-case stresses and deflections. These components may be combined by the square root of the sum of the squares (SRSS) method.
HA-3100 ALLOWABLE MATERIALS HA-3110 GENERAL REQUIREMENTS (a) Material used shall have properties and composi- tion suitable for the application as defined by the design specification and the service conditions, as defined in AA-4213. Materials shall be in conformance with the ASME and the ASTM materials listed in Table AA- 3100. Substitute materials shall be equivalent to or exceed the requirements in Table AA-3100. Substitute materials shall be approved by the Owner or designee. (b) Materials that are part of the pressure boundary or equipment support shall meet the structural require- ment of Article HA-4000. (c) Materials expressly prohibited or limited shall be explicitly described in the design specification. HA-3111 Protective Coatings All carbon steel surfaces shall be painted to protect against corrosion and to facilitate cleaning and decon- tamination. Coatings shall comply with the requirements of AA-6500 and ASTM D 5144. Coatings shall meet radiation resistance, chemical resistance, and decontami- nation requirements in accordance with the design specification. Stainless steel, galvanized, bronze, copper, aluminum, and glass surfaces are not required to be coated. HA-3200 SPECIAL LIMITATIONS ON MATERIALS HA-3210 METALS HA-3211 Physical Properties Changes in the physical properties of metals at minimum and maximum design temperatures must be recognized and factored into the design of housings. HA-3212 Galvanic Corrosion The possibility of galvanic corrosion due to the relative potentials of aluminum, copper, and their alloys 201 should be considered when used in conjunction with each other, or with steel or other metals and their alloys. HA-3213 Corrosive Vapors Aluminum and zinc shall not be used in the presence of corrosive vapors unless protected by coatings de- signed to prevent deterioration of the metal. Protective measures other than coating shall be approved by the Owner or designee. HA-3214 Nonmetallic Materials The use of nonmetallic materials such as plastics, elastomers, and similar substances is permitted in the construction of housings provided that in the selection of these materials, consideration is given to (a) emission of toxic vapors (b) degradation of properties caused by temperature extremes, radiation exposure, chemical exposure, and aging (c) maintainability HA-3215 Deterioration of Materials in Service It is the responsibility of the Owner or designee to identify the environment in which housings must operate so that the Manufacturer can select the grade ofmaterials to meet the conditions stated in the design specification.

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