Codes Other than ASME

Vessel Codes Other Than ASME Different design and construction rules are used in other countries. Chemical engineers concerned with pressure vessels outside the United States must become familiar with local pressure-vessel laws and regulations. Boilers and Pressure Vessels, an international survey of design and approval requirements published by the British Standards Institution, May-lands Avenue, Hemel Hempstead, Hertfordshire, England, in 1975, gives pertinent information for 76 political jurisdic tions. 

Personnel performing examinations other than visual shall be qualified in accordance with applicable portions of SNT TC-IA, Recommended Practice for Nondestructive Testing Personnel Qualification and Ceitification. Procedures shall be qualified as required in Par. T-150, Art. 1, Sec. Vof the ASME Code. Limitations on imperfections shall be in accordance with the engineering design but shall at least meet the requirements of the code (see Tables 10-58 and 10-59) for the specific type of examination. Repairs shall be made as applicable. 

Radiography of components other than castings and of welds shall be in accordance with Art. 2, Sec. V of the ASME Code. Limitations on imperfections in components other than castings and welds shall be as stated in Table 10-58 for the degree of radiography involved. 

Prefabricated units, other than regularly manufactured buttwelding fittings, that employ plate and longitudinal seams, as contrasted with pipe that has been produced and tested under one of the specifications listed in this Part, shall be designed, constructed, and tested under requirements of the ASME BPV Code Section VIII, Division 1. These requirements are not intended to apply to such partial assemblies as split rings or collars, or to other field-welded details. 

Unless otherwise specified, all welding other than that covered by Section VIII, Division 1, of the ASME Code and ANSI/ASME B31.3, such as welding on baseplates, nonpressure ducting, lagging, and control panels, shall be performed in accordance with ANSI/AWS D1.1, or, at the vendor s option, in accordance with the requirements applied to the pressure containing parts of the pump. 

If a CRM lined pressure vessel is to be designed for below -20°F (-29°C) for reasons other than seasonal atmospheric temperature. Section VIII, Division 1 of the ASME Code requires that the materials and fabrication practices meet minimum notch toughness requirements (Paragraph UG-84). Paragraphs UCS-65, 66 and 67 cover the requirements for vessels operating below -20°F. The use of SA-36 or SA-283 is not permitted. Impact tests are required except for seasonai temperature excursions beiow -20°F (-29°C) or when exempted by paragraph UCS-66 (c) which states that "no impact test is required for materials used for metal temperatures below -20°F (-29°C) when the minimum thickness is the greater of those determined under the most severe conditions of coincident pressure (external or internal) and temperature in accordance with UG-21 for temperatures of (a) -20°F (-29°C) and above and (b) below -20°F (-29°C), in which case the coincident pressure (internal if above atmospheric pressure and external if below atmospheric pressure) shall be multiplied by 2%."... 

Temperature markings. When valves are rated for services other than steam, they will carry the temperature rating marked with numerals followed by the letter F. Cast-iron valves, which usually carry no temperature markings are the exception to this rule. The user should consult the ASME Boiler Code, the Pressure Piping Code, etc., for limiting conditions of cast-iron valves. 

ASME 999h), ASME Boiler and Pressure Vessel Code CaseN-631, Use of Eracture Toughness Test Data to Establish Reference Temperature for Pressure Retaining Materials Other Than Bolting for Class 1 Vessels, Section 111, Division 7, American Society of Mechanical Engineers, New York. 

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