What is the purpose of tell tale hole in a shell and tube exchanger?

If the joints leak at the face end, special tell – tale hole indicates leakage and the ‘tell – tale’ ring will allow the liquids to escape without mixing. Normally sea water is in contact with the inside of the tubes, tube plates and water boxes, where as outside of the tubes carry lubricating oil or water.

What is in a pressure vessel?

A pressure vessel is a closed container designed to hold gases or liquids at a pressure substantially higher or lower than the ambient pressure. Examples include glassware, autoclaves, compressed gas cylinders, compressors (including refrigeration), vacuum chambers and custom designed laboratory vessels.

At what pressure does a vessel become a pressure vessel?

15 psig
AT WHAT PRESSURE DOES A VESSEL BECOME A PRESSURE VESSEL? The answer to this question can vary, but typically a vessel is legally considered a pressure vessel when it holds vapors, gases, or liquids at pressures of 15 psig or above.

What is tale hole?

Telltale holes are holes in the outside of the vessel structure that do not penetrate the wall thickness. They are used for example in reinforcement pads around nozzles to detect defects in the nozzle to shell welds.

What is water box in heat exchanger?

Normally, a waterbox is attached to a tube sheet at one end of the heat exchanger to enclose the ends of the tubes extending through the tube sheet and to supply and direct the flow of water through the tubes of the heat exchanger.

What is an API 510 Inspector?

Certified API 510 Pressure Vessel inspectors must have a broad knowledge base relating to maintenance, inspection, repair, and alteration of pressure vessels. The API 510 examination is designed to determine if individuals have such knowledge.

How many types of pressure vessels are there?

The four most common pressure vessel shapes are: Cylindrical Pressure Vessels. Spherical Pressure Vessels. Horizontal Pressure Vessels.

What is hoop stress and longitudinal stress?

Hoop stress is the stress that occurs along the pipe’s circumference when pressure is applied. … The hoop stress increases the pipe’s diameter, whereas the longitudinal stress increases with the pipe’s length. The hoop stress generated when a cylinder is under internal pressure is twice that of the longitudinal stress.

What is an API 653 Inspector?

The American Petroleum Institute initiated an API 653 Aboveground Storage Tank Inspector Certification Program with the participation of storage tank owners and users. It establishes a uniform national program that assists state and local governments in aboveground storage tank regulations.

What is API standard code?

API specifications are recommended practices developed based on insight gleaned from the petroleum and petrochemical industry – which makes sense given that API stands for American Petroleum Institute. API standards are intended to encourage safety in the oil and natural gas industries specifically.

Is API 510 exam hard?

Usually you need some experience in inspection of unfired pressure vessels for API 510 and the same for process piping for API 570 unless you are an engineer. As a holder of three API certifications and having tested in March for another the test are pretty tough. No thery are really tough!

What is the difference between API 650 and 653?

The API 653 Standard is the corollary to the API 650 Standard. API 650 is for constructing a new above ground liquid storage tank while API 653 is for the maintenance of an API 650 to determine whether the tank fit for continued service.

What is API 571?

API RP 571, Damage Mechanisms Affecting Fixed Equipment in the Refining Industry, is a recommended practice developed and published by the American Petroleum Institute (API) that provides an in-depth look at over 60 different damage mechanisms that can occur to process equipment in refineries.

What is an API 650 tank?

API 650 Vertical flat-bottomed tanks

The API 650 is the American standard for welded flat-bottomed vertical storage tanks. … The API 650 is widely used for tanks designed to withstand low internal pressures, for the storage of typical products such as crude oil, petrol, chemicals and water.