Folder API Series 526 NEW 7/13/04 4:37 PM Page 1 …

1 C ATA L O GThe Safety Va l v eAPI Seri e sAPI Seri e sSeries 526 Folder API Series 526 NEW 7/13/04 4:37 PM Page 1 Type 526 Type 526 Plain lever H3 Type 526 Open bonnetType 526 Balanced bellowsdesignFolder API Series 526 NEW 7/13/04 4:37 PM Page 2 LWN Safety Relief Valves API Series Contents3 ContentsAccessories and OptionsCaps and Levers42 Balanced Bellows44 Metal Seat45 Soft Seal46 Heating Jacket48 Lift Indicator49 DIN Flanges50 Spare Parts52 Approvals59 Capacity Tables Capacities US UnitsSTEAM60 Capacities Metric UnitsSTEAM61 Capacities US UnitsAIR62 Capacities Metric UnitsAIR63 Capacities US UnitsWATER64 Capacities Metric UnitsWATER65 Specification Sheet66 Applications5 Features and Benefits5 Codes and Standards5 Materials Conventional Design6 Balanced Bellows Design8 Sour Gas Service9 How to order Numbering system10 Valve Codes Overview12 Specifications 13 Orifice D14 Orifice E16 Orifice F18 Orifice G20 Orifice H22 Orifice J24 Orifice K26 Orifice L28 Orifice M30 Orifice N32 Orifice P34 Orifice Q36 Orifice R38 Orifice T40 Type 526 Cap H2 Type 526 Packed lever H4 Folder API Series 526 NEW 7/13/04 4.

2 37 PM Page 3 LWN Safety Relief Valves API Series Type 5264 LESER s API Series 526is aspring loaded pressure relief valveseries, specially designed and manu-factured to API 526 and approvedaccording to ASME (Sec. VIII, Div. 1)the Canadian CRN, the European PEDstandard, the German AD 2000-Merk-blatt A2 and those of many othercountries, covering requirements fromend-users, OEM s and engineeringcompanies worldwide, thus allowingimmediate s API Series 526hasbeen optimized in close cooperationwith plant engineers and service spe-cialists, simplifying design with fewercomponents for less down time, fewerspare parts and lower testing at the LESERASME-certified test lab together withup to date manufacturing processesensure the reliability of this state ofthe art API Series 526 NEW 7/13/04 4:37 PM Page 4 LWN Safety Relief Valves API Series Applications Features and Benefits Codes and Standards5 ApplicationsLESER s API Series 526 presents thesimple safe solution for heavy dutyapplications, such as crude oil extrac-tion, transportation and processing in Refineries Chemical industry Petrochemical industry Oil and Gas - Onshore and Offshore Oilfields ( Christmas trees ) Vessels & piping systems Blow-down systems Storage tank farmsFeatures and BenefitsLESER s API Series 526covers a largevariety of types, materials and optionsto fit any application:Scope of Design Seven valve sizes from 1 through 8 14 orifice sizes from D through T Materials.

3 WCB, WC6, CF8M and awide range of material variations forcritical applications Open or closed bonnet, packed orplain lifting lever or gastight cap Optional balanced bellows con-struction for back pressure compen-sation Heating jacket available for high vis-cosity fluids Many other options to adjust to var-ious operating conditionsSimplified design for built-in safety Fool-proof design with few parts forbuilt-in safety Single trim for steam, gas and liquidfor fewer spare parts and easiermaintenance One-piece spindle reduces friction Two-point-guided nozzle for im-proved alignment Self draining body avoids residuesand reduces corrosion Long springs for large pre s s u re rangesEase of plant design, installation,operation and maintenance Reduced number of components foreasier and more cost effective main-tenance Replaceable nozzle and disc Stellited or hardened metal sealingfor longer product life Optional soft seat for superior tight-ness Integral cast support bracketsCodes and StandardsLESER s API Series 526complies withthe following codes and standards: ASME Section VIII National Boardcertified capacities (single trim forsteam, gas and liquid service): UV-stamp ASME Section II - materials ASME and ASME API 526 fourth edition 1995 API 520 and 527 NACE MR 0175 ISO 4126 PED 97/23/EC (CE-marking) CRN, VdTUEV-SV 100,AD 2000-Merkblatt A2 OthersFolder API Series 526 NEW 7/13/04 4:37 PM Page 5 LWN Safety Relief Valves API Series Materials Conventional DesignType 5266 Materials Conventional DesignItemPart NameTrim.

4 StandardStandard Service Type 52621 BodySA 216 WCB5 Nozzle316L6 Adjusting ring316L7 DiscHardenedstainless steel8 Guide316L9 BonnetSA 216 WCB12 SpindleAISI 42014 Split ringAISI 42016/17 Spring plate12L1318 Adjusting screw with bushingAISI 430 FPTFE19 Lock nutSteel22 Lift stop316L54 SpringHigh temperaturealloy steel40 Cap H212L1355 StudB756 Nut2H60 GasketGraphite / 316L61 BallHardenedstainless steel69 Needle bearing316L73 Lock screw316 LRemarkNozzles for flange classes 600 and higher are sup-plied with stellited sealing surfaces as a stan-dardfor improved wear API Series 526 NEW 7/13/04 4:37 PM Page 6 LWN Safety Relief Valves API Series Material Options Conventional DesignMaterial Options Conventional DesignCorrosive Service1 Type 5264 Trim: Duplex Grade DATrim:Monel Grade MATrim:Hastelloy Grade HATrim:StandardPart NameItemSA 351 CF8 MSA 351 CF8 MSA 351 CF8 MSA 351 CF8 MBody1 Duplex Monel Hastelloy C316 LNozzle5 Duplex Monel Hastelloy C316L stellitedDisc7316L316L316L316 LAdjusting ring6316L316L316L316 LGuide8SA 351 CF8M orSA 351 CF8M orSA 351 CF8M orSA 351 CF8M orBonnet9 Spindle12SA 479 316 TiSA 479 316 TiSA 479 316 TiSA 479 316 TiAISI 420 AISI 420 AISI 420 AISI 420 Spring plate16 / 17316L316L316L316 LSplit ring14316L316L316L316 LAdjusting screw with bushing18316L teniferPTFE316L teniferPTFE316L teniferPTFE316L teniferPTFECap H24054316L316L316L316 LLift stop22316L316L316L316 LLock nut19316L316L316L316 LSpringStainless steelStainless steelStainless steelStainless steel55 StudB8MB8MB8MB8M56 Nut8M8M8M8M60 GasketGraphite / 316 LGraphite / 316 LGraphite / 316 LGraphite / 316 L61 Ball31631631631669 Needle bearing316L316L316L316L73 Lock screw316L316L316L316 LNotes:1 Materials in blue.

5 Variations from standard bill of material2316L stellited for flange classes 900 and higherFolder API Series 526 NEW 7/13/04 4:37 PM Page 7 Flanged Safety Relief Valves API Series Materials Balanced Bellows DesignType 5268 LWN Balanced Bellows DesignItemPart NameTrim: standardStandardServiceType 5262 Trim: standardHigh Te m p e r a t u reService Type 52671 BodySA 216 WCBSA 217 WC65 Nozzle316L316L stellited6 Adjusting ring316L316L7 DiscHardened stainless steelHardened stainless steel8 Guide316L316L9 BonnetSA 216 WCBSA 217 WC611 Bonnet spacer1SA 479 316 LSA 479 316L14 Split ring316L316L12 SpindleAISI 420 AISI 42015 Bellows316L316L16/17 Spring plate12L1312L1318 Adjusting screw with bushingAISI 430 FPTFEAISI 430 FPTFE54 SpringHigh temperaturealloy steelHigh temperaturealloy steel40 Cap H212L1312L1319 Lock nutSteelSteel22 Lift stop316L316L55 StudB8MB1656 Nut8M7M60 GasketGraphite / 316 LGraphite / 316L61 BallHardened stainless steelHardened stainless steel69 Needle bearing316L316L73 Lock screw8M8 MNote:1 Orifice T without bonnet spacerRemarkNozzles for flange classes 600 and higher are sup-plied with stellited sealing surfaces as a stan-dardfor improved wear API Series 526 NEW 7/13/04 4.

6 37 PM Page 8 LWN Safety Relief Valves API Series Material Options Balanced Bellows Design Sour Gas Service (H2S)918 Material Options Balanced Bellows DesignCorrosive Service1 Type 5264 Trim: Duplex Grade DBTrim: Monel Grade MBTrim: Hastelloy Grade HBTrim: StandardPart NameItemSA 351 CF8 MSA 351 CF8 MSA 351 CF8 MSA 351 CF8 MBody1 Duplex Monel Hastelloy C316L2 Nozzle5 Duplex Monel Hastelloy C316L stellitedDisc7316L316L316L316 LAdjusting ring6316L316L316L316 LGuide8SA 351 CF8M orSA 351 CF8M orSA 351 CF8M orSA 351 CF8M orBonnet9 Spindle12SA 479 316 TiSA 479 316 TiSA 479 316 TiSA 479 316 TiAISI 420 AISI 420 AISI 420 AISI 420 Bonnet spacer11SA 479 316 LSA 479 316 LSA 479 316 LSA 479 316 LSpring plate16 / 1722316L316L316L316 LBellows15 Duplex Monel Hastelloy 316 LSplit ring14316L316L316L316 LAdjusting screw with bushing316L teniferPTFE316L teniferPTFE316L teniferPTFE316L teniferPTFECap H24054316L316L316L316 LLift stop316L316L316L316L19 Lock nut316L316L316L316 LSpringStainless steelStainless steelStainless steelStainless steel55 StudB8MB8MB8MB8M56 Nut8M8M8M8M60 GasketGraphite / 316 LGraphite / 316 LGraphite / 316 LGraphite / 316L61 Ball3 1 63 1 63 1 63 1 669 Needle bearing316L316L316L316L73 Lock screw316L316L316L316

7 LSour Gas Service (H2S)NACE MR 0175 NACE MR 0175 defines two levels for thesour gas service of safety relief valves:Level 1: for compliance of wetted partsin closed positionLevel 2: for compliance of wetted partsin open E S E R s API Series 526 fulfills therequirements with the standard bill ofmaterials. Only very few modificationsaccording to the table below are rec-ommended. Material test reports andhardness test certificates for pro-ductwetted parts are available on MaterialModificationOption CodeSA 216 WCBSA 351 CF8 MType52625264J25 Material InformationDisc material: 316L stellitedUse standard bill of materialsJ25 Material InformationLevel 1 Level 2 Disc material: 316L stellited1 Use standard bill of materials1 Note:1 Spindle material 316L or stainless steel bellows are available on :1 Materials in blue: variations from standard bill of material2316L stellited for flange classes 900 and higherFolder API Series 526 NEW 7/13/04 4:37 PM Page 9 LWN Safety Relief Valves API Series How to Order Numbering SystemType psigArticle Type Code2 body+bonnet material WCB4 body+bonnet material CF8M7 body+bonnet material CodeIdentifies valve size, bodymaterial, orifice and flange class.

8 Refer to table Va l v eCodes Overview page for Lifting Device2 screwed cap H23 plain lever H34 packed lever H45 plain lever H3 with open bonnetPlease state unit (in gauge)!Please do not exceed pressurerange mentioned in the acc. toOption CodeANSI requiredDIN EN 1092-1 /DIN 2501 Please refer totable on page 50 state in writingArticle to OrderNumbering SystemFolder API Series 526 NEW 7/13/04 4:38 PM Page 10 LWN Safety Relief Valves API Series How to Order Numbering System11456 Options Type 526 OptionCode RJ groove inletL58 O-ring-discCR K J21 EPDM D J22 FKM L J23 FFKM C J20 Disc 316L stellitedJ25 Nozzle 316L stellitedL61 Stainless steel bellows- open bonnetJ68- closed bonnetJ78- high temp. equipment(Type 5267 only)J88 Stainless steel springX04 Adaptor for proximity switchJ39 Proximity switchJ93 Test gag - cap H2J69- packed lever H4J70 Free of oil and greaseJ85 Materials- NACEH01- MONEL Grade MAGrade MB- Hastelloy Grade HAGrade HB- Duplex steelGrade DAGrade DB Heating jacket- Couplings FNPTS01 + H30- Lap joint flangesS01 + H32 Please select requested doc-umentation:Material test report:EN CodeBodyH01 Bonnet L30 Cap/lever coverL31 NozzleL59 DiscL23 1 ASME Section Section VIII+.

9 1 Steam/Gases/Liquids(valid only for CE / VdTUEV)OptionsDocumen-tationCode and and API Series 526 NEW 7/13/04 4:38 PM Page 11 LWN Safety Relief Valves API Series How to order Valve Codes OverviewType 52612 Valve Codes OverviewHow to OrderNote: L in Flange Class 300L means 300 has higher pressure-temperature ratings than class MaterialBody MaterialBody MaterialOrifice[Inch2] Class1 x 2 2500x300 WCBWC6CF8M0 0 1 0101 x 2 002 0111 x 2 0020060111 x 2 0030070121 1/2 x 2 0040080131 1/2 x 3 x 2 0 1 5 0241 x 2 016 0251 x 2 0160200251 x 2 017021026dimensions for1 1/2 x 2 0180220271 1/2 x 3 1/2 x 2 0 2 9/0391 1/2 x 2 030 0401 1/2 x 2 0310350411 1/2 x 2 032042these sizes1 1/2 x 3 0330370431 1/2 x 3 1/2 x 3 0 4 5 1101 1/2 x 3 046 1111 1/2 x 3 0470521121 1/2 x 3 0480531131 1/2 x 3 0490541142 x 3 0500551152 x 3 1/2 x 3 1 4 2 1521 1/2 x 3 143 1532 x 3 1441481542 x 3 1451491552 x 3 1461501562 x 3 x 3 1 6 2 1962 x 3 163 1973 x 4 1641681983 x 4 1651691993 x 4 1661702003 x 4 x 4 2 0 2 2113 x 4 203 2123 x 4 2032072123 x 4 2042082133 x 6 2052092143 x 6 x 4 2 3 2 2423 x 4 233 2434 x 6 2342382444 x 6 2352392454 x 6 2362402464 x 6 237241 x 6 5 8 0 5874 x 6 581 5884 x 6 5815845884 x 6 5825855894 x 6 583586 x 6 5 9 0 5974 x 6 591 5984 x 6 5915945984 x 6 5925955994 x 6 593596

10 X 6 6 4 5 6534 x 6 646 6544 x 6 6476506554 x 6 6486516564 x 6 649652 x 8 6 5 7 6626 x 8 658 6636 x 8 6586606636 x 8 x 8 6 6 5 6716 x 8 6666696726 x 10 667 6736 x 10 x 10 6 7 5 6788 x 10 676 6798 x 10 676677679 OrificeletterOrifice[Inch2]WCBWC6CF8 MWCBWC6CF8 MWCBWC6CF8 MWCBWC6CF8 MWCBWC6CF8 MWCBWC6CF8M1500x300900x150600x150300x150 300Lx150150x150 Flange ClassOrificeletterOrifice[Inch2]1500x150 900x150600x150300x150300Lx150150x150 Flange ClassWCBWC6CF8 MWCBWC6CF8 MWCBWC6CF8 MWCBWC6CF8 MWCBWC6CF8 MWCBWC6CF8 MWCBWC6CF8 MWCBWC6CF8 MWCBWC6CF8 MWCBWC6CF8 MWCBWC6CF8 MWCBWC6CF8 MFlange Class inlet x outletValve size inlet x outletValve CodeThe valve code identifies Valve size Body Material Orifice Flange ClassBody MaterialUse 1500-lbFolder API Series 526 NEW 7/13/04 4:38 PM Page 12 LWN Safety Relief Valves API Series Specifications13 The following pages contain selectioncharts and specification tables. Theyspecify important data about the valvesbased on the API 526 fourth edition1995, like Valve sizes Body materials Flange classes Set pressure and temperature limits Back pressure limitsSpecificationsHow to use Selection ChartsStep1 Determination of the required flow areaand orifice letter (sizing)API RP 520 VALVESTAR Sizing softwareCapacity tables2 Determination of: Material Flange class Valve CodeSelection charts page 14 403 Determination of the material codeSpecification tables page 15 414 Determination of the code for lifting deviceSpecification tables page 15 41 ProcedureReferencesSelection Chart Orifice D005 ANSI flange classValve CodeExample Set pressure:3500 psig Temperature:480 F Required orifice letter: D Valve Code005 Folder API Series 526 NEW 7/13/04 4:38 PM Page 13 LWN Safety Relief Valves API Series Selection Chart Orifice DType 52614 DFolder API Series 526 NEW 7/13/04 4.