This skill and knowledge is obtained by making joints in accordance with proven procedures under the guidance of skilled operators. Plastic materials may stick to hot metal heating surfaces. Copper or copper-alloy heating faces are not suitable, FIG. For any pipe size and wall thickness, the actual fusion joining force is determined by multiplying the interfacial pressure by the area of the pipe end. The values given in parentheses are for information only. Summary of Practice 3. If the melt pattern is still not completely around the pipe end, add an additional 3 s and repeat the procedure.
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IPS 63 mm or less.
One set of holding dd2657 is? This results in loose or astm d2657 cold rings. Further cooling is recommended prior to ditching the pipe. The ends of the piping components shall be square to each other around their full circumference.
astm d2657 See specific safety precautions in 3. IPS pipe is about 1? Summary of Practice 3. NOTE 1—Polybutylene undergoes a crystalline transformation for several days after cooling below its melt temperature. Some tools may have a? NOTE 6—A facer is a rotating cutting device used to square-off the pipe or? A superscript epsilon e indicates an editorial change since the last revision or reapproval.
In some cases, butt-fusion www. Bending, peeling, and elongation tests are useful for this purpose. IPS pipethe pipe may barely contact the heating surface.
ASTM International takes no position respecting the astm d2657 of any patent rights asserted in connection with any item mentioned in this standard. Otherwise, the pipe may rupture from internal pressure.
ASTM D – 07() – Standard Practice for Heat Fusion Joining of Polyolefin Pipe and Fittings
To determine the proper cycle time for astm d2657 particular condition, make a melt pattern on a scrap piece of pipe, using the heating cycle as instructed by the pipe manufacturer. NOTE 8—Some materials may be saddle fused using a hand-stab procedure.
Fusion bonding occurs when the joint cools below the melt temperature of the material. If too little force is used, only the melt in the beads may be fused together and, as the molten material in the joint cools and contracts, voids or non-fused areas may be formed. Cut joints into straps, astm d2657 Fig. To determine a fusion pressure gauge setting for hydraulic butt fusion machines, the force is astm d2657 by the area of the hydraulic cylinders that move the fusion machine carriage.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. At very cold outdoor temperatures particularly with 2, 3, and 4 in.
ASTM D2657 – 07(2015)
When the joint has cooled, remove the alignment c2657, astm d2657 off the top of the? Originally approved in A concave melt surface indicates unacceptable pressure during heating. These procedures are general ones. This device indicates the internal temperature of the heating iron which is usually higher than temperature of the fusion surfaces.
ASTM D – 07() Standard Practice for Heat Fusion Joining of Polyolefin Pipe and Fittings
Keep astm d2657 heater dry at all times. Consult the manufacturer aetm a hand-stab procedure. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Do not use synthetic fabrics which may char and stick to the fusion surface.
Do not push the components into the heater plate as the melting progresses. For the heating tool, this requires bringing the heating tool up astm d2657 or slightly above temperature in a safe area, then disconnecting it from electrical power immediately before use.