Buderus Manual on Trenchless Installation of Ductile Cast ... - Duktus

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Inside and outside protection the collection of sharp-edged fragments that once formed the old grey cast iron pipe. With the directional drilling technique, some of the supporting fluid may soak away through gaps in the soil, thus producing interruptions in a bed that was formerly even. This may result in settlement of the cover, or in short: trenchless techniques are carried out „out of the public eye“ as it were, and there is thus no controlling eye which can check that the stringent requirements which apply to the conventional open-cut techniques are in fact satisfied. It is clear that what has to be used in the „black box“ that the trenchless techniques represent is the most rugged pipe which has the coating able to withstand the highest mechanical loads. The <strong>Buderus</strong> ductile cast iron pipe, which has, comparatively speaking, the highest energy of deformation of all the types of pipe for water pipelines (see section 2.1), has the best prerequisites for undamaged installation under the uncheckable conditions that exist with the trenchless techniques. At the same time the positive-locking BLS ® joint, with its high permitted tractive forces, allows installation pits to be spaced at long intervals without any risk of the pipes failing when they are being pulled in. Ductile cast iron pipes with BLS ® restrained joints and cement mortar coatings 2.4.2 Inside protection As mentioned in the preceding section, the use of tar and asphalt as both an outside and an inside protection for cast iron pipes was discontinued in the 19 0‘s. Whereas bituminous paints were then used for outside protection, an entirely new path was taken in the case of inside protection in the form of a lining of cement mortar. Depending on the application, what are available nowadays for the inside protection of ductile cast iron pipes are cement mortar linings based on blast furnace cement for drinking water applications or ones based on alumina cement for sewage applications. At <strong>Buderus</strong> Giesserei Wetzlar GmbH, coatings of these two variant types are applied to the inside of the pipe by the rotary centrifugal process to DIN 2880. This process gives the cement mortar lining a very high abrasion resistance. Even rates of flow of up to 20 m/s for the medium carried are no problem. Water is life 29
Properties of ductile cast iron pipes 2.5 Reference documents [2.1] DIN EN Rohre, Formstücke, Zubehörteile aus duktilem Gusseisen und ihre Verbindungen für Wasserleitungen – Anforderungen und Prüfverfahren [Ductile iron pipes, fittings, accessories and their joints for water pipelines – Requirements and test methods] [2.2] DIN EN 98 Rohre, Formstücke, Zubehörteile aus duktilem Gusseisen und ihre Verbindungen für die Abwasser-Entsorgung Anforderungen und Prüfverfahren [Ductile iron pipes, fittings, accessories and their joints for sewerage applications – Requirements and test methods] [2.3] Leupold, J.: Theatrum machinarum hydrotechnarum der Wasserbaukunst; Leipzig 172 [2. ] DIN 28 03: Rohre und Formstücke aus duktilem Gusseisen – Steckmuffen-Verbindungen – Zusammenstellung, Muffen und Dichtungen [Ductile iron pipes and fittings - Push-in joints; survey, sockets and gaskets] [2. ] DVGW-Arbeitsblatt GW 310: Widerlager aus Beton; Bemessungsgrundlagen (Entwurf 2007) [Concrete abutments: principles of sizing (draft of 2007)] [2. ] DVGW-Arbeitsblatt GW 3 8: Längskraftschlüssige Muffenverbindungen für Rohre, Formstücke und Armaturen aus duktilem Gusseisen oder Stahl [Longitudinal force-fit restrained joints for ductile cast iron and steel pipes and fittings] [2.7] DVGW-Arbeitsblatt GW 321: Steuerbare horizontale Spülbohrverfahren für Gas- und Wasserrohrleitungen – Anforderungen, Gütesicherung und Prüfung [Steerable horizontal directional drilling methods for gas and water pipelines – Requirements, quality assurance and testing] 30
Page 1 and 2: Buderus Ma
Page 6 and 7: 1. Introduction Introduction When t
Page 10 and 11: At x 100 magnification, these graph
Page 12 and 13: 10 3 kp cm Fig. 2.7 Steel Ductile G
Page 14 and 15: Fig. 2.11 How the pipes are produce
Page 16 and 17: 2.3 Development in the joint-making
Page 18 and 19: joints is DVGW Arbeitsblatt GW 3 8
Page 20 and 21: Longitudinal force-fit joints and t
Page 22 and 23: Longitudinal force-fit joints and t
Page 24 and 25: 2.3.2 Making the BLS ® joint Makin
Page 26 and 27: Fig. 2.21 Left lock Catch Right loc
Page 28 and 29: 2.4 Inside and outside protection I
Page 32 and 33: Reference documents [2.8] Gaebelein
Page 34 and 35: General What is said above is true
Page 36 and 37: Other pluses that the two technique
Page 38 and 39: Fig. 3.5 Hydraulic unit The press-p
Page 40 and 41: 3.2 The auxiliary pipe technique Th
Page 42 and 43: In the final stage of the operation
Page 44 and 45: 3.4 Requirements for the site Requi
Page 46 and 47: Reference documents
Page 48 and 49: Both the variants of the burst lini
Page 50 and 51: During the pulling process, the tra
Page 52 and 53: 4.3.2 Joints As in virtually all tr
Page 54 and 55: Reference documents 3
Page 56 and 57: Fig. 5.3 Assembly of the string of
Page 58 and 59: the outlet nozzles. In rocky soils,
Page 60 and 61: 5.3 General requirements Companies
Page 62 and 63: A prerequisite for this procedure i
Page 64 and 65: Table .1 provides an overview of th
Page 66 and 67: Installations Nominal size DN lengt
Page 68 and 69: Reference documents [ . ] DVGW Arbe
Page 70 and 71: Fig. 6.2 Traction vehicle Fig. 6.3
Page 72 and 73: 6.4 Joints The longitudinal force-f
Page 74 and 75: Areas of application, advantages an
Page 76 and 77: Reference documents 7
Page 78 and 79: 7. 2 A description of the technique
Page 80 and 81:
Buderus Giesserei
Page 82 and 83:
Fig. 7.8 Pushing in a pipe A descri
Page 84 and 85:
7.5 Reference installations No. Loc
Page 86 and 87:
[7. ] Rink, W.: Langrohrrelining mi
Page 88 and 89:
In the second step, the pilot is up
Page 90 and 91:
8.3 Outside protection Outside prot
Page 92 and 93:
8.6 Reference documents [8.1] Richt
Page 94 and 95:
A consideration of the economics of
Page 96 and 97:
A consideration of the economics of
Page 98 and 99:
[9.2] DVGW-Hinweis W 09: Auswirkung
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BLS ® restrained joint DN 80 to DN
Page 102 and 103:
Technical data sheets 101
Page 104 and 105:
General Pipes must not be: • drop
Page 106 and 107:
Filling in the pipe pit DN 80 - DN
Page 108 and 109:
DN 80 - DN 00 BLS ® joints There m
Page 110 and 111:
Use of clamping ring joints DN 80 -
Page 112 and 113:
Notice on assembly DN 80 - DN 00 BL
Page 114 and 115:
Retrospective application of weldin
Page 116 and 117:
11.2 Installation instructions for
Page 118 and 119:
Inserting the locking segments DN 0
Page 120 and 121:
Angular deflection DN 00 - DN 1000
Page 122 and 123:
Disconnecting BLS ® joint disconne
Page 124 and 125:
Shrink-on devices and protective ta
Page 126 and 127:
ZMU Before a pipe is cut, the ZMU s
Page 128 and 129:
ZMU 127
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129
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131
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Buderus Manual on Trenchless Installation of Ductile Cast ... - Duktus

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