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What does CSO and CSC mean?
CSO valve – the valve is locked open. Without lock key, the valve cannot be closed. example is the isolation valve upstream/downstream of a PSV. CSC valve – the valve is locked close. Without lock key, the valve cannot be opened.
What is lo valve?
Locked Open (LO) Valve The Locked open valves are a kind of isolation valves on the inlet and outlet of a PSV that must remain open during normal operation in order that they can protect the equipment on which they are mounted.
What does CSO stand for in piping?
Car Seal Open
CSO. CSO is an abbreviation of Car Seal Open. Very simply, the terms describe to need to lock (seal) a valve to prevent operation either in the open or closed position. The device to achieve this is a Car Seal (see also CSC).
What does CSO stand for engineering?
A chief scientific officer (CSO) is a position at the head of scientific research operations at organizations or companies performing significant scientific research projects.
What are the purposes of CSC CSO in piping?
Generally used on process critical valves to prevent inadvertent or accidental operation of the valve. Car Seals (CSC) on lever operated ball valves, isolating a safety relief valve.
What is a Carseal?
A metal or plastic cable used to fix a valve in the open position (car seal open) or closed position (car seal closed).
What is Lo in piping?
The inlet and exit of Pressure Safety Valves (PSVs) and relief valves would be an example of Locked Open (LO) valves. This appears to be for safety critical valves-for example, insulation valves for pressure relief valves-to keep them open or closed and to stop someone from adjusting the location without permission.
What is Fail last valve?
When a control valve is “Fail last” it means when it loses its “driving force”, the stem left in its last position. When a control valve is “Fail lock” it means when it loses its “driving force”, the stem left in its last position AND it is secured in its last position.
What is TP in piping?
Threadless copper pipe, often referred to as TP pipe, is a seamless copper pipe material manufactured to the requirements of ASTM B 302 – Standard specification for Threadless Copper Pipe, Standard Sizes. Threadless copper pipe (TP) is usually joined by brazed socket-cup type fittings or socket-cup type flanges.
What is slip on flange?
Slip on Flange is essentially a ring that is placed over the pipe end, with the flange face extending from the end of the pipe by enough distance to apply a weld bead on the inside diameter. Slip on flange may also be used a lap joint flanges if Type B or Type C stub ends are used.
What is full form CSO?
The Central Statistics Office (CSO) is a governmental agency in India under the Ministry of Statistics and Programme Implementation responsible for co-ordination of statistical activities in India, and evolving and maintaining statistical standards. It has a well-equipped Graphical Unit.
What is CSO certification?
The Common Safety Orientation (CSO) is intended for new workers in the oil and gas industry. With content that is driven and endorsed by industry, the CSO provides consistent safety messaging that clearly explains safe work practices and eliminates the need for redundant general orientation training.
What does CSO stand for in valve lock?
Locked valves are shown as LO and LC on PIDs and use either a padlock and chain or a proprietary valve lock. CSO stands for Car Sealed Open. The Car Seal is nothing more than a wire loop with a lead seal across its ends, through the valve wheel or lever.
What is the definition of Lo, LC, CSC?
Does any one here know of an authoritative source (ASME, ISA, NFPA, OSHA, etc..) that gives a definition for the following in one of their standards or codes and the number for that standard or code: LO (Valve Locked Open) LC (valve Locked Closed) CSO (Valve Car Sealed Open)
What’s the difference between CSC and locked valves?
CSO and CSC are NOT the same means of restriction as Locked Open and Locked Closed. Locked valves are shown as LO and LC on PIDs and use either a padlock and chain or a proprietary valve lock. CSO stands for Car Sealed Open. The Car Seal is nothing more than a wire loop with a lead seal across its ends, through the valve wheel or lever.
When to use lo or LC in valves?
LO or LC: Using LO / LC valves is often correlated with health. This system provides a means of ensuring that, during normal operation, all vital manual valves stay in their desired position and are not worked erroneously. Maintaining such a system requires comprehensive and thorough processes to control valve location and lock maintenance.