전체 글114 End of curve power requirement (to determine motor rating) End of curve power requirement (to determine motor rating) http://www.cheresources.com/invision/topic/11994-standby-centrifugal-pump-driver-sizing/ 지금까지 모터 Rating은 API 610 (11th ed.)의 7.1.4 항목에 따라서만 결정되는 줄 알았다. 하지만 역시 이는 minimum requirement일 뿐이었다. 그동안 Vendor 견적에 표시된 파워가 과도하다고 생각했던 것은 판단 미스. 최근 진행중인 프로젝트의 FEED에 다음과 같은 언급이 있었다. "Motor rating of pumps shall cover end of curve power on pump performa.. 2014. 11. 28. ASME B73.1 and ISO 5199 - A Quick Comparison ASME B73.1 and ISO 5199 - A Quick Comparison https://www.wilfley.com/blog/asme-b73-1-and-iso-5199-a-quick-comparison/ The widely referenced centrifugal pump standard known as ASME B73.1 can trace its origins as early as 1955, when efforts to develop chemical pump standards began. This later evolved into the American Voluntary Standard in 1962 and, in conjunction with a similar Hydraulic Institut.. 2014. 11. 19. FRP Pipies (GRP/GRE/GRV Pipes) http://www.adpf.ae/docs/about_frp.html About FRP Pipies RTRP stands for Reinforced Thermosetting Resin Pipe and FRP stands for Fiberglass Reinfoced Plastic Pipe. FRP is a composite material consisting of a thermosetting polymer, often a type of polyester, reinforced with glass or other fibers. Glass fibers provide strength and stiffness to a composite material. Different types of resins are used.. 2014. 11. 14. Definitions of Spare Part Commissioning and Start-up Spares Parts Commissioning and start-up spares parts, cover the type and number of spares which will be required prior to and during the commissioning and start-up period. 2 Year Operating Spares Operating spare parts are those required for day-to-day maintenance for the initial 2 year of operation. These parts may fail in use, if there is no planned replacement interv.. 2014. 11. 7. Pipe Roughness Pipe Roughness For all claculations of pressure drop, the following pipe roughness values should be used: Pipe Roughness for Typical Materials Material Roughness Carbon Steel (CS) - Process 0.05 mm Stainless Steel (SS) 0.05 mm Titanium and Cu-Ni 0.05 mm Glass Fiber Reinforced Pipe (GFRP) 0.005 mm Polyethylene, PVC 0.005 mm 2014. 9. 30. Standard Conditions / Normal Conditions The standard and normal conditions for volumetric measurement of gas and liquids are defined at pressure and temperature of: - Standard Conditions : 1.01325 Bara and 15.6 deg.C - Normal Conditions : 1.01325 Bara and 0 deg.C 2014. 9. 30. Priming System Sizing http://lynnengineeredsystems.com Priming System Sizing Proper sizing of a vacuum priming system is based on the required volume of air to be removed from the suction piping within the acceptable period of time. Sizing also depends on whether operation of the system is On Demand, where priming is done before each time a pump needs to start or Automatic systems that maintain a constant prime for i.. 2014. 8. 4. Priming System Selection http://lynnengineeredsystems.com Application Analysis Determining the proper system type and sizing for the application is the first step in selecting a vacuum priming system. Selecting the proper type of system depends upon the application requirements of the pump or pumps that require priming. There are two system types to consider, On-Demand priming or Automatic priming. Each system type is a.. 2014. 8. 4. Nominal capacity / Design capacity Q : What is the difference between nominal and design capacity? A : Nominal capacity is the total liquid hold-up capacity of the Tank and Design capacity is the liquid hold up capacity up to High-High Liquid level. 2014. 7. 28. 플랜트 구매 (Plant Procurement) 플랜트 구매 (Plant Procurement) [출처] 링마벨 엔지니어링 블로그 "Engineering 뽀개기" 플랜트 구매는 Process engineer 입장에서 보면, 가장 거리가 먼 분야에 속합니다. 구매과정에 참여하는 것은 기껏해야 TBE (Technical Bid Evaluation) 정도이고, 그나마도 주체적인 것이 아닌 support 가 전부입니다. 그래도 알아서 나쁠건 없으니 정리해 보도록 하겠습니다. Design 관점에서 살펴보면, 어느 단계까지 비교적 자유롭게 design change 가 가능한지 감을 익히는 것도 좋을 듯 합니다. 1. The Role of Procurement 1) Project 수행에 필요한 기기, 자재 등을 구입하는 업무 2) 기기, 자재에 대한 사전 검증 (.. 2014. 7. 28. Pump Seal Plan Pump Seal Plan [출처] 링마벨 엔지니어링 블로그 "Engineering 뽀개기" Seal Plan 의 목적은 pump 내의 rotating part (eg. shaft) 와 stationary part (eg. baering) 사이의 마모를 줄이는데 있습니다. Process fluid (pumping fluid) 의 property (flammability, toxic, hazardous, harmful, Hydrocarbon, etc...) 에 따라 single seal 과 double seal 로 구분이 됩니다. 다시 double seal 은 Seal Reservior 의 pressure 가 Seal Chamber pressure 보다 높거나 적느냐에 따라 plan 이 구분됩니다. 보통 .. 2014. 7. 23. Commissioning Procedure 시운전은 보통 아래의 과정을 통해 이루어집니다. Planning --> Pre-Commissioning --> Commissioning --> Start-up --> Performance Test 1. Planning 이 단계에서는 주로 설계자료 검토, 시운전 수행자료준비, 인원 선발 의 주요 업무가 포함되어 있습니다. 이중 가장 중요한 것은 시운전 수행자료 준비가 되겠습니다. 시운전을 위해 먼저 system 을 수행단위로 나누고 Sequence 의 기본골격을 정하여 각 step 마다 필요한 action 을 세분화하여 D/B 를 구축하고 Schedule 을 정립합니다. 시운전 엔지니어의 경험이 무엇보다 크게 영향을 차지하며, 역량에 따라 현장에서의 re-work 를 줄일수 있습니다. 2. Pre-Comm.. 2014. 7. 23. 이전 1 2 3 4 5 6 7 8 ··· 10 다음 728x90 반응형
