INSTALL_2009 - Laserfiche WebLink

Home Browse Search

Proper tapering tolerances are set at the factory. However, It TRENCHING AND BACKPILLlNG is recommended the toot settings be checked prior to tapering pipe- To compenselte for wear of the grinding drum, the mandrels can e field adjusted. Refer to the toot operating proper construction of trenches is important. They should b instructions for field adjustment procedures. be wide and deep enough to accommodate me piping end backfill material. Bee Table 5 for recommended minimum The tapering tools will produce a fluid-made taper that Inserts burial depths. into the same bell to-06"(3 mm)tolerance when compared to a factory-made tapered spigot. The angle for property made Typically, piping should be sloped at least 1/9" (3 mm) per field tapers for 2"-4" (50 mm-100 mm) diameter pipe should foot toward the tank. Support pipe properly to prevent low be 13/4 degrees. NOTE: If the manual tapering tool is used, points• make sure the blade holder reads 13/4 degree. If not,it should The piping should be Separated by fl distance of at least be replaced- four to six inches (100 mm-150 mm)- For double-wall secondary containment piping installations, refer to Table WARNING-When tapering pipe with a 2000 series power 11 on page 14 for recommended distances. tool. DO NOT rotate pipe with your hand over the end of the pipe as this could result in serious injury. place �& both hand*firmly around the pipe a minimum of 2"from the end of the pipe and rotate oounter clockwise. Keep a firm grip on the pipe at all times and keep moving 4•WIL 9� in a oonstant motion. If you loosen your grip on the pipe, the grinding drum oould grab the pipe and spirt it baokwards resulting in the pipe being looked up on the tool and possibly oauaing Injury. There ars several power tapering tools available for use with Red Thread IIA piping systems tems that our company does not •\ � r.� i.� �ii'y i.i .� r. � s manufacture. It is the tool operator's responsibility to . ..... ensure that the tool being used is reproducing a field- made taper that is within the toleranoes of a favtory- �. + i• ;:!. + ;, made tapered spigot. Refer to Manual No. F6600 for the correct procedures to verify matching tapered spigot � ' ' ri �•'- �''' ': �:•' r � r tolerances. go m • it the power tools are not available, a manual tapering 1M le tool kit should be used. The f•• ti a•Iw4 1"-B" tool (F6000) Is a hand- Refer to Table 5 for A and B Dimensions held tool that can be adapted for a power drive when a Compact backfill carefully over and around the piping large number of tapers are system, When using required. tamping equipment, take care to prevent vibration When using a manual tool and pipe Is clamped into a chain from driving small stones vise,extend pipe at least 12 Inches(300 mm)beyond chain to into the pipe wall. The prevent ovaling of the pipe. For short nipples, taper one end amount of compaction and of the pipe and cut to the desired finished length. Ine4art the the type of soil determines tapered side into a sleeve coupling. Insert into toot and taper. the soil modulus. For example, pea gravel has Backfill must All tapering tool settings should be oheoked at the be- a typical modulus of 1,000 be tamped into ginning of each job. psi with no compaction, shaded areas. while sand requires slight compaction (85% Proctor density) to achieve a modulus of 1,000 psi. Refer to ASTM D3839 or AWWA C950 for further details. • Cover the pipe as soon as possible after successful testing to eliminate the chance of damage to the pipe, floating of the pipe due M flooding, or shifting of the line due to Caving In of thQ trench walls- If damage is suspected, the linea 0 should be retested. YES NO • Frozen earthwilleventualy, thaw, leaving the pipe with insufficiQnt support and voids around the pipe. Take care to remove frozen lumps from all backfill materials before using. 4