API-RP-576

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Table 9.5.1 Marking system used for valves approved by TÜV to AD-Merkblatt A2, DIN 3320 and TRD 421 Fion Zhang/ Charlie Chong
The Kdr or aW value can vary according to the relevant fluid and is either suffixed or prefixed by the identification letter shown in Table 9.5.2. Table 9.5.2 Fluid types defined as steam, gas or liquid Fion Zhang/ Charlie Chong
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API-RP-576 Inspection of Pressure-r
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Fion Zhang/ Charlie Chong Speaker:
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5 Causes of Improper Performance 5.
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1 Scope Fion Zhang/ Charlie Chong
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The recommendations in this publica
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This publication does not cover tra
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pressure-relief valves Fion Zhang/
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pilot-operated pressure-relief valv
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upture disks Fion Zhang/ Charlie Ch
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2 Normative References Fion Zhang/
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• ASME PTC 25, Pressure Relief De
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3.1 General For the purposes of thi
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galling Fion Zhang/ Charlie Chong
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3.2 Dimensional Characteristics of
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inlet size outlet size Fion Zhang/
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Fion Zhang/ Charlie Chong huddling
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Fion Zhang/ Charlie Chong lift
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Basic Function of a Spring Loaded S
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Valve Closed. In a direct spring lo
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The pressure below the valve must i
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Fion Zhang/ Charlie Chong F p = p*A
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Functional Diagram. The following d
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3.3 Operational Characteristics—S
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3.3.3 maximum allowable working pre
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3.3.4 maximum operating pressure Th
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Fion Zhang/ Charlie Chong Keywords:
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3.4.5 burst-pressure tolerance The
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3.4.10 marked burst pressure or rat
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4 Pressure-relieving Devices Fion Z
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4.2 Pressure-relief Valve Fion Zhna
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4.3 Safety Valve. Fion Zhnag/ Charl
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4.3.1 General. A safety valve is a
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4.3.2 Applications A safety valve i
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4.4.1 General. A relief valve is a
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4.5 Safety-relief Valve. Fion Zhnag
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4.6 Conventional Safety-relief Valv
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4.6 Conventional Safety-relief Valv
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http://www.leser.com/en/products/do
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Conventional safety valves Fig. 9.2
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Types Mediums Limitations Safety-re
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4.7.3 Limitations Balanced safety-r
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Fion Zhnag/ Charlie Chong Fig. 9.2.
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Fion Zhnag/ Charlie Chong http://ww
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4.8 Pilot-operated Pressure-relief
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What is a Pilot operated safety val
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4.8 Pilot-operated Pressure-relief
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Figure 9—High-pressure Pilot-oper
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4.8.2 Applications Pilot-operated s
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4.9 Pressure- and/or Vacuum-vent Va
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4.9.1 General. • A pressure- and/
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Figure 7—Low-pressure Diaphragm-t
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Figure 10—Weight-loaded Pallet Ve
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Figure 11—Spring and Weight-loade
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5 Causes of Improper Performance Fi
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Fion Zhang/ Charlie Chong Figure 22
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Figure 25—Monel Rupture Disks Cor
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Fion Zhang/ Charlie Chong
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Fion Zhang/ Charlie Chong Figure 35
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5.1 Corrosion Fion Zhang/ Charlie C
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Corrosion is a basic cause of many
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http://www.valveworld.net/safetyequ
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Because there is metal-to-metal con
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Basic interferometry The interferen
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As light travels through the Optica
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Example: 1 a series of fringes indi
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Causes of damaged valve seats; 1. C
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Spring failures. 2 modes of failure
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Fion Zhang/ Charlie Chong The size
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Incorrect calibration of pressure g
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How to adjust a PSV The spring dete
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http://www.cicpro.com/products/safe
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The design of the shroud must be su
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Page 167 and 168: 5.5 Plugging and Sticking Fion Zhan
Page 169 and 170: 5.6 Misapplication of Materials Fio
Page 171 and 172: Typical ball valve material selecti
Page 177 and 178: 5.7 Improper Location, History, or
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Page 183 and 184: Rough handling can occur during;
Page 185 and 186: The following table summarises the
Page 187 and 188: Greater differentials between opera
Page 189 and 190: 5.10 Improper Discharge Piping Test
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Page 193 and 194: Fion Zhang/ Charlie Chong the bello
Page 195 and 196: 5.11 Improper Handling, Installatio
Page 197 and 198: Rupture disk problems are often ass
Page 209 and 210: 6.1 Reasons for Inspection and Test
Page 211 and 212: 6.2.2 Safety 1. proper authority an
Page 213: National Board approved ASME stamps
Page 217 and 218: 6.2.5 Removal of Device from System
Page 219 and 220: Exercise; Dismantling of PSV Fion Z
Page 221 and 222: Highly Reactive Materials Water-Rea
Page 223 and 224: 6.2.7 Inspection of Adjacent Inlet
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Page 227 and 228: 6.2.10 Visual Inspection This inspe
Page 229 and 230: 6.2.11 Dismantling of Valve. Disman
Page 237 and 238: Portable Test Separator Internal &
Page 239 and 240: The pilot assembly and dome area co
Page 241 and 242: 6.2.13 Reconditioning and Replaceme
Page 243 and 244: Fion Zhang/ Charlie Chong Most test
Page 247 and 248: After the valve has been adjusted,
Page 249 and 250: Check for leakage during pressuriza
Page 257 and 258: 6.2.17 Completion of Necessary Reco
Page 259 and 260: when a valve operates in nonfouling
Page 261 and 262: ASME BPVC Section I requires; • B
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6.2.20 Inspection, Testing, Mainten
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6.2.21 Inspection, Testing, Mainten
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6.3 Visual On-stream Inspection Vis
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6.4.2 Frequency of Shop Inspection/
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Manufacturer’s Basis • Manufact
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API572, 6.4.3 Frequency of Visual O
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Routine • inspection least interf
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7.1 Objective The primary objective
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7.3 Responsibilities Some companies
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Annex A (informative) Pressure-reli
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API576 Charlie Chong/ Fion Zhang/ H
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A.1 Need and Function of Test Block
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A.2 Testing with Air • Air is com
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A.4 Description of Test Block The s
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Key 1. test station 2. adaptor for
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API-RP-576

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