b'OILFIELD PLUG VALVE - LT - SP STYLEA P P E N D I X CRECOMMENDED MINIMUM PSL FOR PRIMARY PARTS NACE No Yes Yes Yes No YesHigh H2s Concentrate No No Yes No No YesClose Proximity* No No No Yes Yes YesRated Working Pressure, PSIPSL PSL PSL PSL PSL PSL5,000 1 1 2 2 1 310,000 2 2 3 3 3 415,000 and up 3 3 4 4 4 4* See paragraph A5 of API 6A 17a. Ed.PR1 is standardPR2 also available (increased cycle times on test required)API MATERIAL REQUIREMENTSMINIMUM MATERIAL REQUIREMENTSMATERIAL CLASS BODY, BONNET & FLANGE PRESSURE CONTROLLING PARTSAA - General Service Carbon or low alloy steel Carbon or low alloy steelBB - General Service Carbon or low alloy steel Stainless SteelCC - General Service Stainless Steel Stainless SteelDD - Sour Service a Carbon or low alloy steel b Carbon or low alloy steel bEE - Sour Service a Carbon or low alloy steel b Stainless Steel bFF - Sour Service a Stainless Steel b Stainless Steel bHH - Sour Service a CRAs bcd CRAs bcdAs per API 6A (ISO 10423) 2013:aAs defined by ISO 15156 (all parts) (NACE MR0175) (See API 6A)bIn compliance with ISO 15156 (all parts) (NACE MR0175) (See API 6A)cCRA required on retained fulid-wetted surfaces only; CRA cladding or low-alloy or stainless steel is permitted (See API 6A)dCRA as defined in API 6A; ISO 15156 (all parts) (NACE MR0175; see API 6A) definition of CRA does not apply.Australian Pipeline Valve - Installation, Operation and Maintenance Manual 15'