When we set up our stockholding division ‘Stock Services’ in 2008 we begun with the goal of becoming one of the top three distributors of stainless steel SEAMLESS fittings, buttweld pipe fittings, forged pipe fittings & pipe flanges in India. In 2010 we’ve got our own manufacturing plant in India and Ras Al Khaimah & since then we have developed our range further to include CPVC Pipe Fittings, flanges, & valves products and you can find accurate & best price here on our website.
Below are our available CPVC Pipe Fittings, flanges, & valves products that will meet your project needs. We will help you put together your entire project and ship it to your closest port. We ship globally!.
FEATURES & BENEFITS :
• MECHANICAL STRENGTH : When non-metals replace metal in process applications for corrosion reasons, the mechanical strength of the system becomes a key design consideration. In order to ensure a safe and reliable operation, non-metals must provide sufficient mechanical strength to meet design criteria such as maximum operating pressure, strength at elevated temperature, equipment service life and structural integrity.
• MINIMIZING PROCESS LIFE CYCLE COSTS : The Industrial System provides adequate tensile strength for operations up to 93°C (200°F). In addition, the System can be expected to maintain its pressure-bearing capabilities for 50 years and beyond.
The Industrial Piping System inherently has both the corrosion resistance and mechanical strength required for many process applications at a total installed cost lower than those of carbon steel.
• CHEMICAL RESISTANCE : CPVC industrial pipes and fittings are inert to most mineral acids, bases, salts and aliphatic hydro carbons, and compares favorably to other non-metals in these chemical environments.
OTHER FEATURES :
• Internal & external corrosion resistance
• Fire resistance
• Leak proof
• Higher temperature and pressure bearing capacity
• Low friction loss
• Low thermal Conductivity and thermal expansion
• Immunity to galvanic or electrolytic corrosion
• Easy & low installation cost
AVAILABLE SIZE :
Pipes : ½” (15 mm) to 12” (300 mm)
SCH 40 & SCH 80 IPS as per ASTM F441
Fittings : ½” (15 mm) to 12” (300 mm)
SCH 80 IPS as per ASTM F439
FIELDS OF APPLICATIONS :
• Metal treating
• Pulp and paper
• Power sector
• Sugar industries
• Water treatment plants
• Fertilizer and Chemical industries
• Steel industries
• Shipping industries
• Chemical processing
Thermal Expansion and Contraction
Thermal Expansion and Thermal Stresses
It is important to consider thermal expansion when designing a system. Most thermoplastics have a coefficient of thermal expansion which is significantly higher than those of metals. However, CPVC has the lowest thermal expansion of any commonly used thermoplastic. The thermal expansion of a piping system subject to a temperature change can therefore be significant, and may need compensation in the system design. The expansion or contraction of thermoplastic pipe may be calculated from the following formula:
L= y (T max – T min) L
Where L = expansion of pipe in feet or meters
Y = coefficient of thermal expansion in in/in/°F or m/m/°C ( CPVC = 3.4 × 10 -5 in/in/°F)
T max = maximum temperature in °F or °C
T max = minimum temperature in °F or °C
L = length of pipe run in feet or meters
The thermal expansion and contraction of CPVC and other piping materials is displayed below.
Thermal Expansion of Piping Materials
Expansion Loops and Offsets
As a rule of thumb, if the total temperature change is greater than 30°F (17°C), compensation for thermal expansion should be included in the system design for pipe runs greater than 100 ft (30m). The recommended method of accommodating thermal expansion is to include expansion loops or offsets where necessary in the system design.
The proper dimensions for an expansion loop may be calculated from the following formula:
Where R = leg length of the expansion loop
D = outside diameter of piping
L = thermal expansion of pipe as calculated above
An offset schematic is presented below.
The proper leg length for an offset is 1.2 times the leg length for an expansion loop. The proper dimensioning of an expansion loop is presented graphically.
Expansion loops and offsets should be constructed with straight pipe and 90° elbows which are solvent cemented together. If threaded pipe is used in the rest of the system, it is still recommended that expansion loops and offsets be constructed with solvent cement in order to better handle the bending stresses incurred during expansion. The expansion loop or offset should be located approximately at the midpoint of the pipe run and should not have any supports or anchors installed in it. Valves or strainers should not be installed within an expansion loop or offset. Supports should be installed approximately 1 ft (0.3 m) on either side of an expansion loop, and approximately half the length of the offset on either side of an offset.
If thermal expansion is not accommodated, it is absorbed in the pipe as an internal compression. This creates a compressive stress in the pipe. The stress induced in a pipe which is restrained from expanding is calculated with the following formula:
S = EyT
Where S = stress induced in the pipe
E = tensile modulus (see Section 4.1.1 and Figure 4.1.2.A)
Y = coefficient of thermal expansion
T = total temperature change of the system
Because the coefficient of thermal expansion of steel is five times lower than that of CPVC, dimensional changes due to thermal expansion well be five times less. However, as can be seen by the equation above, the stresses induced in the piping system due to restrained thermal expansion are dependent on the material’s modulus of steel is approximately 80 times higher than that of CPVC, the stresses resulting from restrained expansion over a given temperature change will be approximately 16 times higher for steel than for CPVC.
For instance, restrained expansion over a 50°F temperature change will produce approximately 600 psi of stress in a CPVC system, but 9800 psi of stress in a steel system. CPVC’s relatively more flexible nature will usually allow it to absorb its lower stresses in a buckling or snaking of the line if necessary. Because steel piping is too rigid to buckle, its higher stresses are often transferred to surrounding structures, resulting in damaged supports, anchors, or even abutting walls.
Adequate supports for any piping system is a matter of great importance. In practice, support spacings are a function of pipe size operating temperatures, the location of heavy valves or fittings and the mechanical properties of the pipe material.
To ensure the satisfactory operation of piping system the location and type of hangers should be carefully considered. Hangers should not compress, distort, cut or abrade the piping.
All piping should be supported with an approved hanger at intervals sufficiently close to maintain correct pipe alignment and to prevent sagging or geade reversal. Pipe should also be supported at all branch ends and at all changes of direction. Support trap arms as close as possible to the trap. In keeping with good plumbing practices support and brace all closet bends and asten closet flanges.
1. Concentrated loads should be supported directly so as to eliminate high stress concentrations. Should this be impractical then the pipe must be supported immediately adjacent to the load.
NOTE: The above information provides general guidelines. It should be used only as a reference and not as a guarantee of performance. Specific installation instructions and techniques may be required as a result of local plumbing and building codes, engineering specifications and instructions.
2. In systems where large fluctuations in temperature occur, allowances must be made for expansion and contraction of the piping system. Since changes in direction in the system are usually sufficient to allow for expansion and contraction hangers must be placed so as not to restrict this movement.
3. Since plastic pipe expand or contracts approximately five times greater than those of steel, hangers should not restrict this movement.
4. Hangers should provide as much bearing surface as possible. To prevent damage to the pipe, file smooth any sharp edges or burrs 011the hangers or supports.
5. Support spacing for horizontal piping systems is determined by the maximum operating temperature the system will encounter. The piping should be supported on uniform centers with supports that do not restrict the axial movement.
6. For vertical lines, it is recommended that an engineer design the vertical supports according to the vertical load involved.