Piping

13. How are pipe flanges rated? Give details

In lbs of workable pressure, such as 150 lb, 300lb and 600 lb flanges being most common but can go up to 2500 lb. The rating is relative and does not represent actual pressure capacity.

6. Describe what nominal pipe size means. Give details. They approximate pipe diameters

It estimates internal diameters for pipes up to 12". Pipes 14" are larger it approximates the outside diameter.

10. Name three types of vessels

Sphere Bullet Hemispheroid

11. Name the various destructive and non-destructive methods of inspection of pipes and vessels

1. visual 2. tapping 3. ultrasonic 4. x-ray (electromagnetic) 5. Radioactive "pill" 6. Magnetic crack -magnaflux 7. Penetrating dye 8. Trepanning

8. What is heat tracing and what is its purpose? Give details.

A coil of heated wire or tubing that is adhered or wrapped around a pipe to increase temperature of the process fluid, reduce viscosity, and facilitate flow.

14. What is a rupture disk? Give details.

Designed to protect against over pressure. Metal or plastic disks designed to break at a preset pressure.

3. What are the four ways that process pipes are connected?

Flanged Screwed Welded Glued/Bonded_

7. What does the term schedule mean when referring to process plant piping? Give details.

It is a piping reference number that pertains to wall thickness, I.D., O.D. and specific weight per foot of the pipe.

1. What is the most common type of material of construction for process plant piping?

Low Carbon steel

12. Nickel alloys are very expensive but they are sometimes used in the process industries. Name three of these nickel alloys and state why they are used in the PI.

Monel Hastelloy Inconel

9. What are blinds used for and what are the three types of blinds?

Paddle Figure 8 Blind flange

5. What are the three most common types of pipe flanges?

Raised face Ring joint Flat face

2. What material of construction is most often used for process plant piping that is exposed to temperatures below -50 0F and between 900 0F and 1500 0F?

Stainless steel

4. What are two uses for pipe flanges?

Used for instances when pipes need to be disconnected from other pipe or equipment. Can be used for pump or compressor connection.