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

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Fig. 2.21 Left lock Catch Right lock High-pressure lock With nominal sizes from DN 00 to DN 1000, the planar locking segments are inserted in the axial direction through the twin openings in the end-face of the socket and are then moved to be evenly spaced around the circumference. To simplify the locking process, the openings are preferably positioned to be at the crown of the pipe (Fig. 2.23). Once all the locking segments have been inserted in the gap in the socket, they are shifted as a whole around the circumference sufficiently far for none of the humps to be visible through the openings in the socket. The segments are fixed by a clamping strap and locked by gently pulling the pipe out of the joint until the welding bead comes to rest against the segments. An extra-strong metal clamping strap has proved useful in directional drilling projects involving a number of changes of direction (Fig. 2.2 ) A detailed description of how the various components are dealt with and used can be found in the operating instructions (section 11). Making the BLS ® joint Fig. 2.22 Fig. 2.23 Fig 2.24 2
Properties of ductile cast iron pipes Table 2. shows the average assembly times required by a practised team of one or two pipe layers to make a BLS ® joint. The differences are the result of the different possible ways in which the joint can be protected. In the majority of pipe replacement operations, the joints are made for one length of pipe at a time in a pipe-assembling pit dug for the purpose. After the step of making the joint, the pipe string is pulled forward by the length of one pipe. If the on-site logistics are organised in the optimum way, it is possible to achieve speeds of installation of 0 to 0 metres an hour for the lower range of nominal sizes. It is impossible to achieve speeds of this kind with welded joints between pipes, especially if one bears in mind that with pipes of ductile cast iron using BLS ® joints the maximum permitted tractive force can be applied, in full, immediately the joint has been made and there is no need to wait for any cooling times. Table 2. : Average assembly times for the BLS ® joint 2 Nominal size Number of fitters Assembly time with no joint protection [min] Assembly time when a protective sleeve is used [min] Assembly time when shrink-on sleeves are used [min] DN 80 1 1 DN 100 1 1 DN 12 1 1 DN 1 0 1 1 DN 200 1 7 17 DN 2 0 1 7 8 19 DN 300 2 8 9 21 DN 3 0 2 9 10 23 DN 00 2 10 12 2 DN 00 2 12 1 28 DN 00 2 20 22 3 DN 700 2 22 - 37 DN 800 2 2 - 0 DN 900 2 28 - 3 DN 1000 2 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 28 and 29: 2.4 Inside and outside protection I
Page 30 and 31: Inside and outside protection the c
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
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7. 2 A description of the technique
Page 80 and 81:
Buderus Giesserei
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Fig. 7.8 Pushing in a pipe A descri
Page 84 and 85:
7.5 Reference installations No. Loc
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[7. ] Rink, W.: Langrohrrelining mi
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In the second step, the pilot is up
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8.3 Outside protection Outside prot
Page 92 and 93:
8.6 Reference documents [8.1] Richt
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A consideration of the economics of
Page 96 and 97:
A consideration of the economics of
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[9.2] DVGW-Hinweis W 09: Auswirkung
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BLS ® restrained joint DN 80 to DN
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Technical data sheets 101
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General Pipes must not be: • drop
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Filling in the pipe pit DN 80 - DN
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DN 80 - DN 00 BLS ® joints There m
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Use of clamping ring joints DN 80 -
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Notice on assembly DN 80 - DN 00 BL
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Retrospective application of weldin
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11.2 Installation instructions for
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Inserting the locking segments DN 0
Page 120 and 121:
Angular deflection DN 00 - DN 1000
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Disconnecting BLS ® joint disconne
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Shrink-on devices and protective ta
Page 126 and 127:
ZMU Before a pipe is cut, the ZMU s
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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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