Sleeve valve pipe grouting process technology 1. Drilling hole drilling method using casing wall drilling, drilling depth should reach the height of the grouting consolidation section. During the drilling process, records should be made for grouting operations. 2. According to the requirements of grouting, the lower pipe should be type B grouting pipe under the grouting part and type A grouting pipe under the non-grouting part. Firstly, add a stuffy cap at the bottom of the connected grouting pipe, and put the grouting pipe into the grouting hole. Make sure that the grouting pipe goes to the bottom of the hole, the upper part is above the ground, and then fill in the grouting pipe. Water, the use of gravity, so that the grouting pipe will not float, then slowly raise the casing, and then cover the top of the grouting pipe to prevent debris from entering the grouting pipe, affecting the grouting work quality. 3. After the plugged casing is pulled out, it shall be filled with sand or gravel below 1m above the ground, and shall be plugged with quick-setting cement mortar around 1m above the ground to the ground segment and around the orifice to prevent slurry from grouting. The phenomenon occurs. 4. The grouting adopts segmented grouting. The length of each grouting is called grouting step. The tube length is the length of the grouting step. The grouting step is generally selected from 0.6 to 1 m, which can effectively reduce the effect of formation heterogeneity on the grouting effect. For the sand layer, the grouting step should be chosen to have a low value; for sand pebbles or broken rock layers, the grouting step should be set at a high value. During the grouting process, the length of the heart tube is moved up or down one step after the grouting is completed. Should use the lifting equipment to move, or manually use two pipe clamps symmetrically clamped the heart tube, both sides at the same time and force, move the heart tube. For each grouting length of 3 to 4m, remove one grouting heart tube. After the grouting is completed, a squeezing cover is placed on the grouting pipe to facilitate re-injection construction.
LED-Fluorescent Lamp Protection Sleeves/PET Explosion-proof tube LED Light Heat Shrink Tube
Product Description:
LED-Fluorescent Lamp Protection Sleeves is made of PET materials, PET Explosion-proof tube LED Light Heat Shrink Tube with superior transparency, good heat dissipationeffect, insulation, protect the glass not to break.
Feature & benefit:
a) White LED-PET heat-shrink tube can homogenize the dot light to area light.
b) The uniform theory of light diffusion heat shrink sleeve is that the light ray will generate many refraction, reflection and scattering when the light go through the different refraction rate medium and get the effect of optical diffusion.
c) Light transmittance can be up to 85-93%, haze 95-99%, customizable.
d) RoHS compliant, no mercury, uvioresistant,save energy and low carbon.
Application:
It`s widely applied to T5,T6,T8,T10,T12 LED lights for light diffusion and proofing explosion.
Operating indexes:
a) Min. Shrink temp.:60 degrees Celsius
b) Final shrink temp.: 125 degrees Celsius
c) Work temp. : -55~125 degrees Celsius
Instruction:
Increase length 5mm at both ends of the glass lamps when cutting the tube, set the glass lamps which have been scrubbed by alcohol and dried on to the cutting heat shrink tube.
Put them into the 75-85℃constant temperature thermal cycling tunnel furnace to shrink.After 1-2 minutes, check if the tube is shrinkable.
If not, let them shrink sequentially. If the temperature is a little high, the heat shrink tube will generate crystal and black patches. Trim them with art knife after they are cold already, go to next step to install if no problem.
Product Images:
LED & Fluorescent Lamp Protection Sleeves
Fluorescent Lamps Protective Sleeves,FEP Shrink Tube,PTFE Shrink Tube,PFA Heat Shrinkable Tube,Explosion Proof Lamp Tube Shrinkable Film,LED Light Diffusion Film
KEYUACE Materials Co., Ltd. , https://www.insulationtubing.com
