ASME Unfired Pressure Code

Equation 4-36 is for membrane shells with a negligible thickness. As the pressure and the shell thickness increase, the stress distribution across the thickness is non-uniform. Therefore, some correction to the membrane theory is required. The modified code equation as given by the ASME Unfired Pressure Code, Section VIII, Division 1 is ... 

As with the coolers, the larger filter bodies come under the jurisdiction of the ASME unfired pressure vessel code. If they do, the filter should receive the code stamp. The filter bodies and the heads should be con... 

C = ASME Unfired Pressure Vessel Code constant for a vapor as described above, C is a function of the specific heat ratio, K. The equation given earlier for determining C is expressed in tabular form in Table 2. 

American Society of Mechanical Engineers (ASME) Unfired Pressure Vessel Code Section 8, Division 1... 

The American Society of Mechanical Engineers (ASME) Unfired Pressure Vessel Code is accepted by almost all states as a requirement by law and by most industrial insurance underwriters as a basic guide or requirement for fabrication of pressure vessel equipment, which includes some components of heat exchangers. 

The hazard of brittle-fracture is lessened as the average and local stress levels are lowered. Both the ASME Unfired Pressure Vessel Code (Par. UCS-66) and the Code for Pressure Piping (Par. 323.2.2) recognize this by allowing materials to be used below the transition temperature. Where the allowable stress is reduced to 40% of the normal allowable, the ASME Code permits such material to be used without limitation. The code for pressure piping sets an allowable stress of 15% of the maximum allowable without impact test. 

From the 1956 ASME Unfired-Pressure-Vessel Code with Permissioii of the Amerimn Society of Ateehanical Engiueers... 

MG11A-H112. (From the 1956 ASME UnfIred Pressure Vessel Code with permission of the A-fn. Soc. Mech. Engrs.)... 

ItMi 14. Chart for det rmin ng shell thickness of cylindrical and spherical vessels under external pressure when constructed of austenitic steel (18 Cr—8 Ni, type 304. (From the 1956 ASME Unfired Pressure Vessel Code with permission of the Am. Soc. Mech. Engrs.)... 

The first ASME Code for pressure vessels was issued as Rules for the Construction of Unfiied Pressure Vessels, Section VIII, 1925 edition. The rules applied to vessels over 6 in. in diameter, volume over 1.5 ft and pressure over 30 psi. In December 1931, a Joint APl-ASME Committee was formed to develop an unfiied pressure vessel code for the petroleum industry. The first edition was issued in 1934. For the next 17 years, two separate unfired pressure vessel codes existed. In 1951, the last API-ASME Code was issued as a separate document. In 1952, the two codes were consolidated into one code— the ASME Unfired Pressure Vessel Code, Section VIII. This continued until the 1968 edition. At that time, the original code became Section VIII, Division 1, Pressure Vessels, and another new part was issued, which was Section VIII, Division 2, Alternative Rules for Pressure Vessels. 

Reactor vessel. The 10-ft-ID spherical pressure vessel is designed according to the ASME Unfired Pressure Vessel Code, with consideration given to... 

ASME Boiler and Pressure Vessel Code. The ASME Boiler and Pressure Vessel Code is pubhshed in 11 sections. Section VIII, which is concerned with rules for the design of unfired pressure vessels, was first pubhshed in 1925 and since 1968 it has been issued in two parts. Division 1 (147) and Division 2 (148), the latter being known as the Alternative Rules. 

Pressure- Vessel Standards. Explosion-clad plates for pressure vessels are tested according to the appHcable ASME Boiler and Pressure Vessel Code Specifications. Unfired pressure vessels using clads are covered by ASTM A263, A264, and A265 these include tensile, bend, and shear tests (see Tanks AND pressure vessels). 

Note that for fired boilers, where the safety valve installation must comply with the ASME Code for Power Boilers rather than the code for Unfired Pressure Vessels, the allowable accumulation is only 6% instead of 10%. Reference also should be made to the Kj and A definitions, above. 

An abbreviated listing of the key rating provisions is given in paragraphs UG-125 through 135 of the ASME code, Section 8, Div. 1, for unfired pressure vessels [1]. 

Unfired Pressure Vessels, Section Vlll, ASATE Boilers and Pressure Vessel Code (Latest Edition), ASME, 345 E. 47th Street, New York, N.Y... 

ASME Code for Unfired Pressure Vessels, Section VIII, Division I... 

Unfired pressure vessels should be designed and constructed in accordance with Section VIII, Division 1 or Division 2, of the ASME 6o 7er and Pressure Vessel Code. 

ASME Boiler and Pressure Vessel Code. Sec. VIII. Unfired Pressure Vessels... 

Figure 18.15. References to items covered in the ASME Code for Unfired Pressure Vessels, Section VIII Division 1 (Chuse and Eber, 1984).

Storage tanks should be designed in accordance with the ASME code for unfired pressure vessels. All-welded construction is recommended. Ethylene oxide storage tanks should be electrically grounded, isolated from potential fire hazards, and equipped with pressure relief devices. New equipment should be cleaned of iron oxide and immediately puiged with inert gas. 

United States ASME I ASME III ASME VIII ANSI/ASME PTC 25.3 Boiler applications Nuclear applications Unfired pressure vessel applications Safety and relief valves - performance test codes... 

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