Mechanical Engineering

API 675 says that the metering pump has to be tested at 1.5 times the MAWP (Maximum Allowable Working pressure) but not less than 20psig (API 675 4.3.2.1)

the material usually classified based on their properties.

Annealed (Not Hardened) — Material has been heat treated at approximately
600° F to reduce strength and hardness levels. Also known
as dead soft.

30 PSIG is about equal to 45 PSIA. Saturation temperature from the steam tables at 45 PSIA is about 274°F. So the steam would be 274°F, or hotter if superheated.

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Lt means - long travelling

ct means- cross travelling

In the area of industrial pipe fittings:

Long radius 90 deg elbow has a take off dimension of one and one half times

the nominal diameter of the pipe. Ex-4 inch pipe has an actual diameter of 4.5,

for the elbow the take off dimension would be 4"*1.5=6".

The short radius elbow take off dimension is the same as the nominal size, 4".

To add to the point, a short radius elbow can be used typically where space is a constraint. Hence fluid flow is also restricted in this case unlike in case using of Long Elbow.

The pitch of a screw thread is a measure of how closely the threads are spaced. It can be expressed as the number of threads per unit length (32 threads per inch, for example) or as the distance between two threads ( such as .8 mm).

3 FEATURES OF FLUX CORED ELECTRODES

Flux cored electrodes combine the advantages of several of the welding processes we have discussed earlier. As with coated electrodes, the flux improves the weld metal chemi- cal composition and mechanical properties. As in gas metal arc welding and submerged arc welding, productivity is increased because the electrode is continuous.

7.3.0.1 Flux cored electrodes may be used for welding carbon steels, low alloy high strength steels, and the high strength quenched and tempered steels. They are also used for welding stainless steels and abrasion resistant steels. These will be covered in subse- quent lessons.

7.3.1 Functions of the Flux Ingredients - As with coated ingredients, each manufac- turer has his own formulas for the flux ingredients. The composition of the flux core can be varied to provide electrodes for specific applications.

7.3.1.1 The basic functions of the flux ingredients are:

a) Deoxidizers and Denitrifiers - Since nitrogen and oxygen can cause porosity or brittleness, deoxidizers such as manganese and silicon are added. In the case of self-shielded electrodes, denitrifiers such as aluminum are added. Both help to purify the weld metal.

b) Slag Formers - Slag formers such as oxides of calcium, potassium, silicon or so- dium are added to protect the molten weld puddle from the atmosphere. The slag aids in improving the weld bead shape and "fast freezing" slags help hold the weld puddle for out-of-position welding. The slag also retards the cooling rate, especially important when welding the low alloy steels.

c) Arc Stabilizers - Elements, such as potassium and sodium, help produce a smooth arc and reduce spatter.

d) Alloying Elements - Alloying elements, such as molybdenum, chromium, carbon, manganese, nickel, and vanadium, are used to increase strength, ductility, hardness and toughness.

e) Gasifiers - Minerals, such as fluorspar and limestone, are usually used to form a shielding gas in the self-shielded type wires.

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In some milling operations, the cutting tool remains stationary while the machine vice is used to move the work piece into the cutting tool and complete the machining operation. The precision movement of the machine vice allows the machinist to create pin-point operations by manipulating the vice's controls. In other operations, the machine vice is simply used to position the work piece while it is milled. This typically occurs when machining a work piece that is flat and square.

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The device which control the speed of Turbine is Governor. The Governing system sense the speed of shaft & regulate the Fuel/ Motive fluid flow to the Turbine to maintain the set shaft speed.

1- it is amatter of preference

2- considered under gyroscopic precession

Stress is a measure of the load applied to a sample relative to a cross sectional area of the sample. Strength is a quantification of the samples ability to carry a load. The terms "yield strength" and "yield stress" of a material are usually used interchangeably (correct or not). It is the stress which will just cause the material to plastically deform. If a material yields at 30,000 psi, the yield stress is 30,000 psi. If the part in question has a cross sectional area of 2 square inches, the strength at yield would be 60,000 pounds, but usually we just say the yield strength is 30,000 psi.

DADO.I am not sure if I am allowed to use a sentence on this, since it makes my answer more than fourletters. A Dado Is a blade made of different stacked cutters used primarily on table saws. It cuts a groove in whatever the board or stock is, and the width can be adjusted by adding, and taking away from the stack of blades.

after the main safety valves are open

Clocks, Foot operated pedal bin, Bicycle (brakes, gears, levers), Scissors, Bicycle pump, Door handle, Hand whisk, Ballpoint pen, Salt and pepper grinders.

Hope this helps.

It's #150.

no

cast steel is 2707

The drawer slides are made of cold rolled steel strips. Thickness ranges from 1mm to 3mm depending upon the quality and the load of the slide.

Though I do not know the manufacturing process of the slides myself(looking for the answer). But i guess it is made by Roll Forming process and CNC punchers to drill holes.

Tensile strength is a material propery, it does not depend on size. Look at a material chart to find its yield and tensile strenghts.

Then use the stress equation, Stress = Force / Area to determine if your .375 bolt can handle the force on it.

If your bolt is in shear, you need to find Shear strenghts.

FEED stands for Front End Engineering Design. It includes robust planning and design early in a project's lifecycle (i.e., the front end of a project), at a time when the ability to influence changes in design is relatively high and the cost to make those changes is relatively low. It typically applies to industries with highly capital intensive, long lifecycle projects. Though it often adds a small amount of time and cost to the early portion of a project, these costs are minor compared to the alternative of the costs and effort required to make changes at a later stage in the project.

I think, that's refer from your system. If you manipulate the surface pressure of the water, you will get a big value of water suction head with higher surface pressure.

CMIIW....