Emerson Daniel Senior Orifice Fitting Series, Руководство владельца и оператора

Страница: 46 / 138

32 Internal corrosive environments
Section 2: Installation Owner and operator manual
January 2015
3-9008-001 Rev M
2.5.2 Internal corrosive environments
For Daniel Senior Orifice Fittings located in internal corrosive environments, Daniel recommends
that product owners purchase a Senior appropriate for the intended service. Daniel offers the
Daniel Senior Orifice Fitting in a number of trims (Refer to
Table 1-1 thru Table 1-5 for part and
material lists).
A Senior is a flow measurement device built to exact inside diameter specifications. Daniel does
not provide an allowance for corrosion on the inside diameter.
2.6 Low temperature service
Daniel designed the Senior to function within the temperature/pressure ranges, per material,
designated in ASME/ANSI B16.5. However, the grease viscosity will increase at low
temperatures. This will hamper proper slide valve lubrication. Increased viscosity impedes the
flow of grease through channels within the Senior and may allow leakage to occur during
subsequent plate change operations. Refer to
Section 5.2: Lubricant information to determine
lubricant operation ranges for the available grease types prior to making an orifice plate change.
2.7 Design considerations
Measurement personnel can select a Senior for use in a variety of flow measurement systems
around the world. Each application has its own unique set of service and environmental
condition limitations (Refer to
Section 1.2.1: Technical data ).
Important
Product owners and operating personnel must evaluate both the service, and environmental
conditions prior to installing a Senior Orifice Fitting. Therefore, it is the responsibility of the end
user to install the Senior in a well designed piping system.
Some conditions to consider:
• Service operating pressure
• Service testing pressures
• Service process temperature and ambient site temperatures
• Mass of fluid in process and test conditions
• Chemical composition and toxicity of fluid in operating conditions
• Traffic, wind and earthquake at loading site
• Reaction forces and moments which result from supports, attachments, piping, etc.
• Corrosion, erosion, fatigue, etc.
• Decomposition of unstable fluids in operating and test conditions
• Possible damage from external fire