Showing posts with label piping plover. Show all posts
Showing posts with label piping plover. Show all posts

Wednesday, June 22, 2011

PEX tubing or Copper Pipe, And Why?

PEX tubing or Copper Pipe, And Why?


PEX tubing is nothing but the tube cross-linked polyethylene compound. It is quite friendly and durable enough temperature for temperature extremes (no matter if it is hot or cold, ranging from below freezing to 200 ° Fahrenheit) as well. It also provides support for the creep strain resulting from prolonged exposure to stress and any kind of chemical attack. With its many features, it is probably a good choice for hot and cold water.

Understanding copper pipe
Now we need to understand copper pipe and its functions, or it would be difficult for us to compare the two. As you know very well that we are made of copper pipes for a long time. Copper pipes are quite durable and flexible, making them easy to install. In fact, they are much better than the iron pipes. Also, copper pipes promotes environmental biostatic making it less susceptible to any bacterial infection.


Why PEX tubing is better?
The final choice really is yours if you fit pipes of copper or PEX tubing, but personally I prefer to use PEX tubing for several reasons as follows -
• Temperature extremely friendly, can use the hot and cold water
• Fewer complications in development, so it becomes easier to install compared to copper pipe
• Can easily go with any kind of plumbing system
• You can use it with PVC and metal pipes
• It a pressure system just
• What is good for installation in a corner and, as it is very flexible to bend in virtually every corner. To do this, you do not even need to use mounting or coupling.

see also :Stainless Steel Tubing and Fittings in Your Home and Buildings

Friday, April 1, 2011

PIPE FITTINGS AND PIPING SPECIALTIES

PIPE FITTINGS
piping systems must be cleaned, tested, and accepted by Facilities Services prior to being placed in service. Refer to individual piping system specifications Sections for pipe and fitting material and joining methods.

PIPING SPECIALTIES
A. Dielectric unions are to be used at all junctions of dissimilar piping.  Provide isolation valves upstream of dielectric union.

B. Pipe Escutcheons:  Chrome plated, stamped steel, hinged, split-ring escutcheon, with set screw or snap-on type.  Inside diameter shall closely fit pipe outside diameter or outside of pipe insulation where pipe is insulated.  Outside diameter shall completely cover the opening in floors, walls, or ceilings.  In exterior, damp, or corrosive environments, use stainless steel escutcheons.

C. Dielectric Waterway Fittings:  Electroplated steel or brass nipple, with an inert and non-corrosive, thermoplastic lining.

D. Dielectric Unions:  Provide dielectric unions with appropriate end connections for the pipe materials in which installed (screwed, soldered, or flanged), which effectively isolates dissimilar metals, prevents galvanic action, and stops corrosion.

E. Unions:  Malleable iron, class 150 for low pressure service and class 250 for high pressure service; hexagonal stock, with ball and socket joints, metal to metal bronze seating surfaces; female threaded ends.

F. Strainers:  Provide strainers full line size of connecting piping, with ends matching piping system materials.  Screens shall be type 304 stainless steel, with 3/64” perforations at 233 per square inch.
  1. Provide strainers with 125 psi working pressure rating for low pressure applications.
  2. Threaded ends, 2” and smaller: cast-iron body, screwed screen retainer with center blowdown fitted with pipe plug.
  3. Flanged ends, 2 ½” and larger: cast-iron body, bolted screen retainer with off center blowdown fitted with pipe plug.
G. Mechanical Sleeve Seals: Modular mechanical type, consisting of interlocking synthetic rubber links shaped to continuously fill annular space between pipe and sleeve, connected with bolts and pressure plates which cause rubber sealing elements to expand when tightened.

H. Steel Sleeves:  Schedule 40 galvanized, welded steel pipe, ASTM A53, grade A.  Sleeves shall be cast in the slab for new construction, or core drilled and set in epoxy grout for retrofits.  Sleeves in floors shall extend 6” above the floor.





see also : VALVE TYPES