API-RP-576

26.08.2014 Views
pressure-relief valves Safety Valve. Relief Valve. Safety-relief Valve. • Conventional Safety-relief Valve. • Balanced Safety-relief Valve. Fion Zhang/ Charlie Chong

pilot-operated pressure-relief valves Fion Zhang/ Charlie Chong

Page 1 and 2: API-RP-576 Inspection of Pressure-r

Page 3 and 4: Fion Zhang/ Charlie Chong Speaker:

Page 5 and 6: 5 Causes of Improper Performance 5.

Page 7 and 8: 1 Scope Fion Zhang/ Charlie Chong

Page 9 and 10: The recommendations in this publica

Page 11 and 12: This publication does not cover tra

Page 13: pressure-relief valves Fion Zhang/

Page 17 and 18: upture disks Fion Zhang/ Charlie Ch

Page 19 and 20: 2 Normative References Fion Zhang/

Page 21 and 22: • ASME PTC 25, Pressure Relief De

Page 23 and 24: 3.1 General For the purposes of thi

Page 25 and 26: galling Fion Zhang/ Charlie Chong

Page 27 and 28: 3.2 Dimensional Characteristics of

Page 29 and 30: inlet size outlet size Fion Zhang/

Page 31 and 32: Fion Zhang/ Charlie Chong huddling

Page 33 and 34: Fion Zhang/ Charlie Chong lift

Page 35 and 36: Basic Function of a Spring Loaded S

Page 37 and 38: Valve Closed. In a direct spring lo

Page 39 and 40: The pressure below the valve must i

Page 41 and 42: Fion Zhang/ Charlie Chong F p = p*A

Page 43 and 44: Functional Diagram. The following d

Page 45 and 46: 3.3 Operational Characteristics—S

Page 47 and 48: 3.3.3 maximum allowable working pre

Page 49 and 50: 3.3.4 maximum operating pressure Th

Page 51 and 52: Fion Zhang/ Charlie Chong Keywords:

Page 53 and 54: 3.4.5 burst-pressure tolerance The

Page 55 and 56: 3.4.10 marked burst pressure or rat

Page 57 and 58: 4 Pressure-relieving Devices Fion Z

Page 59 and 60: 4.2 Pressure-relief Valve Fion Zhna

Page 61 and 62: 4.3 Safety Valve. Fion Zhnag/ Charl

Page 63 and 64: 4.3.1 General. A safety valve is a

Page 65 and 66: 4.3.2 Applications A safety valve i

Page 67 and 68: Fion Zhnag/ Charlie Chong

Page 69 and 70: 4.4.1 General. A relief valve is a

Page 71 and 72: 4.5 Safety-relief Valve. Fion Zhnag

Page 73 and 74: 4.6 Conventional Safety-relief Valv

Page 75 and 76: 4.6 Conventional Safety-relief Valv

Page 77 and 78: http://www.leser.com/en/products/do


Page 81 and 82: Conventional safety valves Fig. 9.2

Page 83 and 84: Types Mediums Limitations Safety-re

Page 85 and 86: 4.7.3 Limitations Balanced safety-r

Page 87 and 88: Fion Zhnag/ Charlie Chong Fig. 9.2.

Page 89 and 90: Fion Zhnag/ Charlie Chong http://ww


Page 93 and 94: 4.8 Pilot-operated Pressure-relief

Page 95 and 96: What is a Pilot operated safety val

Page 97 and 98: 4.8 Pilot-operated Pressure-relief

Page 99 and 100: Figure 9—High-pressure Pilot-oper


Page 103 and 104: 4.8.2 Applications Pilot-operated s

Page 105 and 106: 4.9 Pressure- and/or Vacuum-vent Va

Page 107 and 108: 4.9.1 General. • A pressure- and/

Page 109 and 110: Figure 7—Low-pressure Diaphragm-t

Page 111 and 112: Figure 10—Weight-loaded Pallet Ve

Page 113 and 114: Figure 11—Spring and Weight-loade


Page 117 and 118: 5 Causes of Improper Performance Fi

Page 119 and 120: Fion Zhang/ Charlie Chong Figure 22

Page 121 and 122: Figure 25—Monel Rupture Disks Cor

Page 123 and 124: Fion Zhang/ Charlie Chong


Page 127 and 128: Fion Zhang/ Charlie Chong Figure 35

Page 129 and 130: 5.1 Corrosion Fion Zhang/ Charlie C

Page 131 and 132: Corrosion is a basic cause of many

Page 133 and 134: http://www.valveworld.net/safetyequ

Page 135 and 136: Because there is metal-to-metal con

Page 137 and 138: Basic interferometry The interferen

Page 139 and 140: As light travels through the Optica

Page 141 and 142: Example: 1 a series of fringes indi



Page 147 and 148: Causes of damaged valve seats; 1. C

Page 149 and 150: Spring failures. 2 modes of failure


Page 153 and 154: Fion Zhang/ Charlie Chong The size

Page 155 and 156: Incorrect calibration of pressure g

Page 157 and 158: How to adjust a PSV The spring dete

Page 159 and 160: http://www.cicpro.com/products/safe

Page 161 and 162: The design of the shroud must be su

Page 163 and 164: Adjustment pin affect the character


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

Page 179 and 180: Fion Zhang/ Charlie Chong V-203


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

Page 191 and 192: Fion Zhang/ Charlie Chong When hydr

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 and 214: National Board approved ASME stamps

Page 215 and 216: The Kdr or aW value can vary accord

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

Page 225 and 226: Fion Zhang/ Charlie Chong Rupture d

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



Page 267 and 268: 6.2.20 Inspection, Testing, Mainten

Page 269 and 270: 6.2.21 Inspection, Testing, Mainten

Page 271 and 272: 6.3 Visual On-stream Inspection Vis

Page 273 and 274: 6.4.2 Frequency of Shop Inspection/

Page 275 and 276: Manufacturer’s Basis • Manufact

Page 277 and 278: API572, 6.4.3 Frequency of Visual O

Page 279 and 280: Routine • inspection least interf

Page 281 and 282: 7.1 Objective The primary objective

Page 283 and 284: 7.3 Responsibilities Some companies

Page 285 and 286: Annex A (informative) Pressure-reli

Page 287 and 288: API576 Charlie Chong/ Fion Zhang/ H


Page 291 and 292: A.1 Need and Function of Test Block

Page 293 and 294: A.2 Testing with Air • Air is com

Page 295 and 296: A.4 Description of Test Block The s

Page 297 and 298: Key 1. test station 2. adaptor for


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API-RP-576

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