Piping hook up drawing

Stress due to occasional events like Seismic and Wind effects. What factors to consider for site selection? District classification, Transportation facilities, Manpower availability, industrial infrastructure, community infrastructure, availability of raw water, effluent disposal, availability of power, availability of industrial gas, site size and nature, ecology and pollution.

Why Stress Analysis is required? Ensure reliability and safety of working by Limiting Stresses sustained, expansion, hydro-test, occasional within code allowable. Reducing damaging effects of dynamic loads. Avoiding leakage at joints. Limiting sagging and displacements within allowable limits. Avoiding high loads on supporting structures. What is the difference between Stress and Pressure? Stress is generated because of internal resistance force. Pressure is generated because of external force.

Pressure can be a cause to generate stress. Where jacked screwed flange is used? For spectacle discs, one flange is jacked screw flange. This flange has two jacked screws degree apart which are used to create sufficient space between flange for easy removal and placement of line blind or spectacle blind.

What is double block and bleed? Two valves with bleed ring in between with a bleed valve connected to the hole of bleed ring. Where blind flange is used? It is used with view to future expansion of the piping system, or for cleaning, inspection etc. What are crude oil ranges? Crude oil BP Range: What is batch shell process? What are types of towers? Stripper, Vacuum tower, trayed, packed towers.

What is chimney tray? What factors to consider while setting tower elevation? NPSH, Operator access, Maintenance access, Minimum clearance, re-boiler type , common area, type of support, Tower dimensions, type of head, bottom outlet size, foundation details, minimum clearances. How to located tower maintenance access nozzles? At bottom, top and intermediate sections of tower, must not be at the down-comer section of tower and in front of internal piping.

How to located feed nozzle? Must be oriented in specific area of tray by means of internal piping. What are the steps in selection of valve? What to handle, liquid, gas or powder, fluid nature, function, construction material, disc type, stem type, how to operate, bonnet type, body ends, delivery time, cost, warranty. What are functions of valves? Isolation, regulation, non-return and special purposes. What are isolating valves? Gate, ball, plug, piston, diaphragm, butterfly, pinch. What are regulation valves?

Globe, needle, butterfly, diaphragm, piston, pinch. What are non-return valves? What are special valves? What materials are used for construction of valves? Cast iron, bronze, gun metal, carbon steel, stainless steel, alloy carbon steel, polypropylene and other plastics, special alloys.

Trim is composed of stem, seat surfaces, back seat bushing and other small internal parts that normally contact the surface fluid. Which standard specifies trim numbers for valve? What are wetted parts of valve? All parts that come in contact with surface fluid are called wetted parts. What is wire drawing? This term is used to indicate the premature erosion of the valve seat caused by excessive velocity between seat and seat disc, when valve is not closed tightly.

What is straight through valve? Valve in which the closing operation of valve is achieved by 90 degrees turn of the closing element. What pressure tests are carried out on valves? Shell-hydrostatic, seat-hydrostatic, seat-pneumatic What are available valve operators? Handlever, handwheel, chain operator, gear operator, powered operator likes electric motor, solenoid, pneumatic and hydraulic operators, Quick acting operators for non-rotary valves handle lift.

What are ball valve body types? Single piece, double piece, three piece, the short pattern, long pattern, sandwich and flush bottom design. What are two types of ball valve? Full port design and regular port design, according to type of seat, soft seat and metal seat. Why ball valves are normally flanged?

Because of soft seat PTFE which can damage during welding. What are butterfly valve types? Double flange type, wafer lug type and wafer type. What are types of check valve? Lift check valves and swing check valves. What are non-slam check valves? Swing check valve, conventional check valve, wafer check valve, tilting disc check valve, piston check valve, stop check valve, ball check valve.

Where stop check valve is used? In stem generation by multiple boilers, where a valve is inserted between each boiler and the main steam header. It can be optionally closed automatically or normally. Where diaphragm valves are used? Used for low pressure corrosive services as shut off valves.

What is Barstock Valve? Any valve having a body machined from solid metal barstock. Usually needle or globe type. A small valve with turned down end, like a faucet. What is Bleed Valve? Small valve provided for drawing off liquid. What is BlowDown Valve? Refers to a plug type disc globe valve used for removing sludge and sedimentary matter from the bottom of boiler drums, vessels, driplegs etc. What is Breather Valve?

A special self acting valve installed on storage tanks etc. What is Drip Valve? A drain valve fitted to the bottom of a droplet to permit blowdown. What is Flap Valve? A non return valve having a hinged disc or rubber or leather flap used for low pressure lines. What is Hose Valve? A gate or globe valve having one of its ends externally threaded to one of the hose thread standards in use in the USA.

These valves are used for vehicular and firewater connections. What is Paper-Stock Valve? A single disc single seat gate valve Slide gate with knife edged or notched disc used to regulate flow of paper slurry or other fibrous slurry. What is Root Valve? A valve used to isolate a pressure element or instrument from a line or vessel, or a valve placed at the beginning of a branch form the header. What is Slurry valve? A knife edge valve used to control flow of non-abrasive slurries.

What is Spiral sock valve? A valve used to control flow of powders by means of a twistable fabric tube or sock. What is Throttling valve?


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Total 1 comments.
#1 27.10.2018 в 06:20 Abdisattor:
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