129:, the external bead can be removed from the pipe, which is done with an 'external de-beader' tool. This provides a smooth exterior on the HDPE pipe, allowing it to pass through the existing pipe more easily. Because the weld bead does not contribute any strength to the butt-welded join, removing it is no detriment to the strength or pressure rating of the pipeline. Some pipeline owners may prefer to leave the bead in place as it often does not affect the installation. The bead may be ground down or stripped off as a HDPE carrier pipe is pulled through its host pipe.
117:
of the new pipe, as well as the wall thickness of the new pipe. Sewer laterals must be reconnected via excavation. Laterals can be welded to liner without excavation if man entry size pipe. Installation usually requires excavation at the insertion and receiving pits. Continuous sliplining generally
83:
Segmental sliplining is very similar to continuous sliplining. The difference is primarily based on the pipe material used as the new carrier pipe. When using any bell and spigot pipe such as FRP, PVC, HDPE or
Spirally Welded Steel Pipe, the individual pieces of pipe are lowered into place, pushed
73:
Steel Pipe, that are connected into continuous pieces of any length prior to installation. The continuous carrier pipe is pulled through the existing host pipe starting at an insertion pit and continuing to a receiving pit. Either the insertion pit, the receiving pit, or both can be
100:
Sliplining is generally a very cost-effective rehabilitation method. It is also very easy to install and requires tools and equipment widely available to any pipeline contractor. Segmental sliplining may not require bypassing of the existing flow.
164:
Mohammed Najafi, PhD, PE and Sanjov
Gokhale, PhD, PE, Trenchless Technology (New York: McGraw Hill, 2004), p. 295-311. Available from Water Environment Federation at
148:
Mohammed Najafi, PhD, PE and Sanjov
Gokhale, PhD, PE, Trenchless Technology (New York: McGraw Hill, 2004), p. 295-311. Available from Water Environment Federation at
57:(8"-60"), but sliplining can occur in any size given appropriate access and a new pipe small or large enough to install.
78:
or other existing access points if the size and material of the new carrier pipe can manoeuvre the existing facilities.
50:
180:
38:
30:
the annular space between the two pipes, and sealing the ends. Sliplining has been used since the 1940s.
34:
110:
46:
113:
because of the size difference between the inside diameter of the existing pipe and the outside
88:
Using either method the annular space between the two pipes must be grouted. In the case of
8:
42:
23:
165:
149:
22:
is a technique for repairing leaks or restoring structural stability to an existing
69:
Continuous sliplining uses a long continuous pipe, such as HDPE, Fusible PVC, or
26:. It involves installing a smaller, "carrier pipe" into a larger "host pipe",
174:
65:
There are two methods used to install a slipline: continuous and segmental.
126:
89:
92:
sewer lines, the service laterals must be reconnected via excavation.
114:
160:
Center for
Underground Infrastructure Research and Education CUIRE
119:
75:
70:
33:
The most common material used to slipline an existing pipe is
27:
109:
The new pipe will generally have a significantly reduced
159:
84:
together, and pushed along the existing pipe corridor.
166:http://www.e-wef.org/timssnet/static/OM/WPM404.htm
150:http://www.e-wef.org/timssnet/static/OM/WPM404.htm
172:
45:are also common. Sliplining can be used to stop
53:to an existing pipe. The most common size is
122:are often installed without bypass pumping.
118:requires bypassing the existing flow. Storm
60:
173:
144:
142:
16:Method for restoring an old pipeline
13:
14:
192:
139:
104:
1:
132:
95:
7:
10:
197:
125:If the HDPE pipe has been
39:fiberglass-reinforced pipe
35:high-density polyethylene
181:Trenchless technology
111:cross sectional area
61:Installation methods
51:structural integrity
188:
152:
146:
56:
196:
195:
191:
190:
189:
187:
186:
185:
171:
170:
156:
155:
147:
140:
135:
107:
98:
63:
54:
17:
12:
11:
5:
194:
184:
183:
169:
168:
162:
154:
153:
137:
136:
134:
131:
106:
103:
97:
94:
86:
85:
80:
79:
62:
59:
15:
9:
6:
4:
3:
2:
193:
182:
179:
178:
176:
167:
163:
161:
158:
157:
151:
145:
143:
138:
130:
128:
123:
121:
116:
112:
102:
93:
91:
82:
81:
77:
72:
68:
67:
66:
58:
52:
48:
44:
40:
36:
31:
29:
25:
21:
124:
108:
99:
87:
64:
55:0.20m - 1.5m
49:and restore
47:infiltration
37:(HDPE), but
32:
19:
18:
127:butt welded
105:Limitations
133:References
96:Advantages
41:(FRP) and
20:Sliplining
175:Category
120:culverts
115:diameter
90:sanitary
76:manholes
28:grouting
24:pipeline
71:Welded
43:PVC
177::
141:^
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.