must be consistent with the steering capability of the maxi-HDD equipment, and the bending capability of the drill rods. The MGS, also has a secondary means of location verification utilizing wire grids laid on the ground surface. This will require a check of ID and OD to ensure that flow capacity and external clearances are still adequate. %%EOF Lengths well in excess of 1000m can be installed with this technique, though depending upon the diameter required the limiting factor may be the axial load capacity of the PE100 pipe for pull-back into the bore. Directional boring tooling includes the suite of drill bits or drill heads used during pilot hole operations, reamers and hole-openers used for hole enlargement, and swab tools which are used for hole conditioning and pullback. Coiled pipe generally has significant degrees of curvature and ovality, and as these prevent electrofusion (or mechanical joints) of good quality being produced, as well as increasing drag and the risk of scoring damage during insertion, the pipe should be passed through a straightener re-rounder before insertion. PART 1 GENERAL 1.1 DESCRIPTION Section includes requirements for Horizontal Directional Drilling (HDD) of High-Density Polyethylene (HDPE) Pressure Sewer pipe. %PDF-1.6 % [4], The equipment used in directional boring depends on the length of the (proposed) crossing, the pipe properties (of the to-be-installed pipeline), and the (anticipated) subsurface conditions. Add: 13th F, Longyu International Building, Zhengzhou Area(Zhengdong), China(Henan) Pilot Free Trade Zone. For the geometry shown in FIGURE 2, with relatively shallow entry and exit angles, the associated load amplification due to this effect is not major; although for more complex paths, the effect could be very important. The use of HDPE pipes in trenchless technology is rapidly becoming a repair building and civil engineering The preferred method of domain pipeline. The image above shows a straightener re-rounder being used on a 180mm pipe, and whilst it is in the trench here, it can be attached to the coil trailer if so desired. Typical Maxi-HDD Route (Obstacle or River Crossing) (Courtesy of Outside Plant Consulting Services, Inc.), FIGURE 5. Table 5 - Safe Pull Loads for HDPE Pipes 24. iii Foreword Polyethylene Pipe for Horizontal Directional Drilling is one of the chapters being pre-pared for inclusion in the Plastics Pipe Institutes PPI Handbook of Polyethylene Pip-ing, which will be issued as a complete volume in the future. 0 The pipe bursting method is in full compliance with all federal regulations and guidelines. Successive reamers are then pulled back to enlarge the bore diameter to the desired size. The number of construction personnel is relatively small, and at least 10-20 people are required for manual excavation, while only 7 people are used for pipeline directional drilling technology. 0000002230 00000 n Smaller diameter PE100 pipe can be pulled in directly from a coil trailer via a straightener re-rounder. Unnecessarily large curvatures (sharp bends) also contribute to bending stresses in the HDPE pipe, but generally are not significant for such a flexible product. Pipefusion is a supplier of high density polyethylene pipe (HDPE) available in solid wall, perforated, profile wall, insulated and gas applications. The physical properties of the PE4710 material allow greater pulling forces and also provide greater resistance to collapse. 4506 0 obj <>stream 380 0 obj <>stream The drill is launched from one end of the designed bore path and retrieved at the other end, and except for the launch and retrieving spaces above ground, the entire process takes place underground . Thus, a commonly used procedure for difficult or very long installations is to fill the pipe with water to reduce the buoyancy. There is no request too small or job too complex. Unnecessarily large curvatures (sharp bends) also contribute to bending stresses in the HDPE pipe, but generally are not significant for such a flexible product. The construction area is relatively small and the construction period is relatively short. This information is encoded into an electromagnetic signal and transmitted through the ground to the surface in a walk-over system. Preliminary site investigation (Section 4). The drill rig and auxiliary equipment located on the pipe exit side are relatively large, and require water access, storage, and mixing and pumping facilities. A result shown in Green and with a Safety Factor This is the basis of MAB-7 (2020), MAB Guidelines for Use of Mini-Horizontal Directional Drilling for Placement of HDPE (PE4710) Pipe in Municipal Applications, as referenced in the 2022 edition of ASTM F1962. 12), Last edited on 12 December 2022, at 19:58, "Fant ny lsning som gir gravefri tilkobling av hus til hovedvannledning", https://en.wikipedia.org/w/index.php?title=Directional_boring&oldid=1127080039, Walk-over locating system A sonde, or transmitter, behind the bore head registers angle, rotation, direction, and temperature data. ASCE Pipeline Design for Installation by Horizontal Directional Drilling, CAPP Planning Horizontal Directional Drilling for Pipeline Construction, MAB-07 (2020) - MAB Guidelines for Use of Mini-Horizontal Directional Drilling for Placement of HDPE (PE4710) Pipe in Municipal Applications, Slavin, Larry and Petroff, Larry (2010). For a drill of this length, with a pull back of 10 inch HDPE pipe, the anticipated schedule is set out in Table 2: Table 2. Chapter 11 - Pipeline Rehabilitation by Sliplining with PE Pipe Chapter 12 - Horizontal Directional Drilling Chapter 13 - HVAC Applications for PE Pipe Chapter 14 - Duct and Conduit Chapter 15 - General Guidelines for Repairing Buried PE Potable Water Pressure Pipes Chapter 16 - Pipe Bursting Glossary Abbreviations Index trailer Uncontrolled or unguided drilling can lead to substantial destruction, which can be eliminated by properly locating and guiding the drill head. Directional boring, also referred to as horizontal directional drilling (HDD), is a minimal impact trenchless method of installing underground utilities such as pipe, conduit, or cables in a relatively shallow arc or radius along a prescribed underground path using a surface-launched drilling rig. FIGURE 1. It should not be used in place of the advice from a licensed Professional Engineer. This is the basis of MAB-7 (2020), MAB Guidelines for Use of Mini-Horizontal Directional Drilling for Placement of HDPE (PE4710) Pipe in Municipal Applications, as referenced in the 2022 edition of ASTM F1962. Although pipe stiffness effects may generally be ignored for flexible PE pipe, there is a potentially important effect can be due to route bends or any path curvature of significance. H|SQO0~W#. Co., LTD, lyondellBasell, PetroChina Dushanzi Petrochemical Company, Prime Polymer, SABIC, SCG & Thai Polyethylene, Sinopec, and Tasnee. International, Inc., 2015, pg. Drilling uids are designed to match the soil and cutter. Welcome customers to visit the factory, or third party factory inspection is acceptable. International, Inc., 2015, pg. He can be reached at lslavin@ieee.org. cut-and-cover and horizontal directional drilling (HDD) techniques are used to install utility pipes under flexible pavements. When designing components to fit the pipe ID, refer to pipe dimensions and tolerances in the applicable pipe manufacturing specification. That is, the soil is being cut and or removed under the influence of high pressure fluid. Image Courtesy:Exova Utilities. B. It is the only system that has the capability of verifying the location. Directional boring, also referred to as horizontal directional drilling (HDD), is a minimal impact trenchless method of installing underground utilities such as pipe, conduit, or cables in a relatively shallow arc or radius along a prescribed underground path using a surface-launched drilling rig. ((H`|JSgy>_)gk]f2%a!gS0qF&)0C@WF%`cJ!Q8x`1f'H#\oe5MaKR28(.n3Z1CUjGTC+o0kBJ0N t-A K:Xyd89EtL}vfAhdQ;>!E@y@}[hE_8 . This technique involves drilling a pilot bore, generally along a closely defined shallow arc, and then, if necessary, enlarging the bore using a reamer or hole opener to create a bore large enough to accept the new PE100 pipe, which is generally pulled in behind a reamer. The plastics pipe industry is a strategic industry, where hardware needs to be reliable for extended periods of time. CANTEX's CAN>LOC and CAN>GRIP systems offer many benefits over HDPE, which is the conduit most used for HDD applications. Pipeline design for installation by horizontal directional drilling -, Skonberg, Eric R., and Tennyson M. Muindi. Now Available: ASTM Guide for Use of Maxi-HDD Placing HDPE Pipe Under Obstacles. 4487 0 obj <> endobj 0000029587 00000 n Alternate materials will require prior approval. If the calculation shows that the maximum permissible load may be exceeded then it may be necessary to increase the capacity of the PE100 pipe by increasing its thickness. The ASTM International document provides overall guidelines, addressing preliminary site investigation, safety and environmental considerations, regulations and damage prevention, bore path layout and design, implementation, and inspection and site cleanup. ?5Hb0CB$ 17C``!Dc@ q endstream endobj 749 0 obj <>stream with relatively shallow entry and exit angles, the associated load amplification due to this effect is not major; although for more complex paths, the effect could be very important. Compared with traditional trenching and buried pipes, it has better technical, environmental protection and economical efficiency, and is suitable for crossing streets, highways, railways, buildings, and rivers, especially in downtown areas, historic sites, green belts, where excavation is impossible or unsuitable areas. as well as possible bends in the horizontal plane, should be avoided, and will increase the required pulling forces. 0000017340 00000 n 0000016763 00000 n The cutting head is then removed and a back-reamer attached. This method applies tension to the PE100 pipe during installation. Pilot holes are enlarged in pre-reaming stages using a reamer (soft soils) or a hole opener (rock). Potential safety issues fall into two general categories: Although not considered to be hazardous materials, the proper handling and disposal of drilling fluid is also discussed to avoid possible environmental issues. The planned bore path, such as illustrated in. Soils containing high percentage of gravel and cobbles are best avoided unless the contractor is especially experienced in the conditions. This is to be avoided if at all possible. The procedure is straightforward and has been incorporated into various software tools, as an engineering and design aid for such projects. The HDPE pipe chosen for the twin sewage tunnels has an outside diameter of 740mm and an internal diameter of 600mm, with a standard dimensional ratio (SDR) of 11 and a pressure rating of 16 bars. HDD is a steerable trenchless technique of installing everything from pipe to cable with minimal construction footprint and minor impact on surrounding areas. Because the operator of the drilling rig might not notice a momentarily excessive pulling force, a load link inserted between the swivel and the PE100 pipe to record pulling load can be used to record the maximum axial load exerted on the pipe. Once the User enters the required Input data and clicks Calculate, 0000004070 00000 n Rizkalla, Moness. These may include the need to file environmental, health and safety plans, or permits for passing beneath waterways, and there may be special requirements for drilling beneath railroads.
