When using a generator, the power recommended by Welping is 2 times as that of the pipe fusion machine. The machine's power is displayed on the specification label on the top of hydraulic station.For example, if the hydraulic station power is 10KW, the heating tool power is 1.5KW,and the planing tool is 1KW, then you need 25KW power for generator at least
Before butt welding, the pipe ends must be rounded and aligned. A pipe roller support will give more help in alignment and reduce the drag pressure. When the mismatch of the pipe walls is still out of local regulation, please adjust the clamping jaws by tightening down the high side until the pipe ends are even.
The digital temperature control indicates the internal temperature of heater. Some heat is lost on the transfer of heat to heater surface. In this case, it is better to use a thermometer to check the surface temperature of the heater. Use this as a reference to monitor the heater temperature during the fusion process.
number that indicates the maximum pipe size it can fuse. For example, butt fusion machine WP630A could fuse maximum pipe 630mm O.D., and from the specification chart, you could always find the minimum size it can fuse. If you have specific requirements for your projects, please consult with Welping sales.
Replacing the blade not depends on a certain period. But you should replace it when two sides of the blade are blunt or chipped. The life of blade varies depending on the hours of operation, material being face, periodical maintenance, etc.
A minimum of (1) complete revolution on each pipe end must be removed in order to expose clean material suitable for butt fusion. Always face to the stops to insure a square face-off perpendicular to the pipe.
The molten joint must be held immobile under force until cooled adequately to develop strength. The proper cooling times for the joint are dependent on the material, pipe diameter and wall thickness and are established by the pipe manufacturer or by applicable company, local, state, or federal standards. Allowing proper times under force for cooling prior to removal from the clamps of the machine is important in achieving joint integrity.Any questions,please contact our sales team via email or Whatsapp as belowEmail: top@welping.cnWhatsapp : 0086-13185061581(Mr.Pan)
There are a variety of accessory items available depending on the machine size and application. See the butt fusion machine's product page for more accessories.Some examples are:InsertsRequired to fuse different pipe sizes that a machine can accommodate.Hydraulic Power Unithydraulic power units designed to meet the maximum system pressure desired on your job site. It offers low power consumption,and also allows both the heater and facer to plug into the hydraulic power unit, allowing the entire machine to draw power from only one receptacle.Heating PlateWith high quality of PTFE coating,enables swift temperature controlPlaning ToolWith safety switch prevents unintentional operation,and coming with durable HSS blades
SDR pipe : "Standard Dimensional Ratio"The SDR pipe is the "Standard Dimensional Ratio" and refers to the geometry of the pipe. SDR is defined as the ratio of the nominal outside diameter to the nominal wall thickness.SDR = dn/enWhere dn is the nominal outside diameter of the pipe and en is the nominal (minimum) wall thickness of the pipe.Therefore a higher SDR indicates a thinner-walled pipe at any given diameter.The relationship between the SDR and the pressure rating is given by Lames formula for the hoop stress in thick wall cylinders:s = P(dn - en) / 2 enThis can be rearranged as;s = P (SDR - 1) / 2Where s is the maximum hoop stress P is the internal pipe pressure.The hoop stress is the design stress for the material, which is the (MRS) divided by the overall service (design) coefficient C.MRS/C = P (SDR - 1) / 2or rearranging;P = 2 MRS / C (SDR - 1)This pressure ‘P' is then defined as the ‘Maximum Operating Pressure' MOP, or the pressure rating of the pipe.MOP = 2 MRS / C (SDR - 1)Where MRS and MOP are in MPa Or MOP = 20 MRS / C (SDR - 1)Where MRS is in MPa and MOP is in bar.Example : What is the MOP or pressure rating of an SDR11 PE100 water pipe?For PE100 the MRS = 10 MPa. For water applications the minimum recommended service design coefficient ‘C' is 1.25.Hence :MOP = 20 * 10 / 1.25 (11 - 1)MOP = 16 bar
Guide to Standard Dimension Ratio (SDR) The standard dimension ratio (SDR)—also referred to as the standard dimensional ratio—is a measurement and method often used by pipe manufacturers to rate the working pressure capacity of a pipe. It is calculated by determining the relationship of the pipe’s outside diameter to its minimum wall thickness. The higher the calculated SDR, the lower the amount of pressure it can handle since the pipe minimum wall thickness is reduced in proportion to the outside diameter remaining the same. The lower the calculated SDR, the higher the amount of pressure it can handle since the wall thickness is thicker in proportion to the pipe diameter. As an example, SDR17 has a thinner wall and lower pressure class than an SDR 11. Knowing and understanding this value is essential for many applications, including, but not limited to, the following:• When calculating the internal pressure inside of a pipe system• When inserting objects into a pipe system such as ID stiffeners for compression fittings• When determining the tensile strength of a pipe under high stress• When assessing the compressive strength of a pipeline undergoing burial