API Std 673 2002 pdf free download

API Std 673 2002 pdf free download.Centrifugal Fans for Petroleum, Chemical and Gas Industry Services.
8.2.2 Material Inspection 8.2.2.1 General 8.2.2.1.1 When radiographic, ultrasonic, magnetic particle, or liquid penetrant inspection of welds or materials is required or specified, the recommended practices in 8.2.2.2 through 8.2.2.5 shall apply unless other corresponding procedures and acceptance criteria have been specified. Cast iron may be inspected only in accordance with 8.2.2.2 and/or 8.2.2.5. Welds, cast steel, and wrought material shall be inspected in accordance with 8.2.2.2 through 8.2.2.5.1. 8.2.2.1.2 Acceptance standards for 8.2.2.2 through 8.2.2.5 shall be mutually agreed upon between the purchaser and vendor. NOTE The user may wish to consult and use as a guide API 687, Ch. 1, Section 3, Table 1.8-1. 8.2.2.2 Radiography 8.2.2.2.1 Radiography shall be in accordance with ASTM E94. 8.2.2.3 Ultrasonic Inspection 8.2.2.3.1 Ultrasonic inspection shall be based upon the procedures ASTM A609 (castings), ASTM A388 (forgings), or ASTM A578 (plate). 8.2.2.4 Magnetic Particle Inspection 8.2.2.4.1 Both wet and dry methods of magnetic particle inspection shall be in accordance with ASTM E709. 8.2.2.5 Liquid Penetrant Inspection 8.2.2.5.1 Liquid penetrant inspection shall be based upon the procedures of ASTM E165. 8.2.3 Mechanical Inspection 8.2.3.1 Centrifugal fans shall be shop assembled prior to shipment. If specified, drivers (if provided) and other auxiliaries shall be included in the shop assembly. If disassembly is required for shipment, all mating parts shall be suitably match-marked and tagged for field assembly. All equipment shall be furnished completely assembled to the maximum extent possible limited only by the requirements of shipping. 8.2.3.2 During assembly of the equipment, each component (including integrally cast-in passages) and all piping and appurtenances shall be inspected to ensure they have been cleaned and are free of foreign materials, corrosion products, and mill scale.
8.3 Testing 8.3.1 General 8.3.1.1 Equipment shall be tested in accordance with 8.3.2 and 8.3.3. Other tests that may be specified by the purchaser are described in 8.3.4. 8.3.1.2 At least 6 weeks before the first scheduled running test, the vendor shall submit to the purchaser, for his/her review and comment, detailed procedures for the mechanical running test and all specified running optional tests (8.3.4) including acceptance criteria for all monitored parameters. 8.3.1.3 Notification requirements are covered in 8.1.3; however, running test requirements shall not be less than 5 working days before the date the equipment will be ready for testing. If the testing is rescheduled, the vendor shall notify the purchaser not less than 5 working days before the new test date. 8.3.1.4 Acceptance of shop tests does not constitute a waiver of requirements to meet field performance under specified operating conditions, nor does inspection relieve the vendor’s responsibilities. 8.3.2 Hydrostatic Test 8.3.2.1 Pressure-containing parts other than fan housing, but including auxiliaries, shall be tested hydrostatically with liquid at a minimum of 1 1 / 2 times the MAWP but not less than gauge pressure of 20 psig (1.5 bar). The test liquid shall be at a higher temperature than the nil ductility transition temperature of the material being tested. (Reference ASTM E1003.) NOTE The nil ductility temperature is the highest temperature at which a material experiences complete brittle fracture without appreciable plastic deformation.
8.3.2.2 Where applicable, tests shall be in accordance with the ASME Code. In the event that a discrepancy exists between the code test pressure and the test pressure in this standard, the higher pressure shall govern. 8.3.2.3 The chloride content of liquids used to test austenitic stainless steel materials shall not exceed 50 parts per million. To prevent deposition of chlorides as a result of evaporative drying, all residual liquid shall be removed from tested parts at the conclusion of the test. NOTE Chloride content is limited in order to prevent stress corrosion cracking. 8.3.2.4 Tests shall be maintained for a sufficient period of time to permit complete examination of parts under pressure. The hydrostatic test shall be considered satisfactory when neither leaks nor seepage through the casing or casing joint is observed for a minimum of 30 minutes. Large, heavy castings may require a longer testing period to be agreed upon by the purchaser and the vendor. 8.3.3 Mechanical Running Tests 8.3.3.1 If specified, a mechanical running test shall be performed. NOTE Some fan manufacturers do not have the capability to perform shop mechanical run tests except on the smaller units. 8.3.3.2 The requirements of 8.3.3.2.1 through 8.3.3.2.7 shall be met before the mechanical running test is performed. 8.3.3.2.1 All warning, protective, and control devices used during the test shall be checked and adjusted as required. 8.3.3.2.2 Bearings intended to be lubricated by an oil mist systems shall be prelubricated.