Why the wall thickness of the clamp pressure sound tube can not be more than 2.0mm

In the construction of roads and bridges nowadays, sound tube is an indispensable acoustic wave detection tube, which is an important part of the ultrasonic testing system of cast-in-place piles. The sound tube is also divided into many types, among which the clamp pressure sound tube has many unique advantages. The construction operation is the simplest, the price is relatively cheap, the tensile strength is guaranteed, and the loss is small. Clamp-type sound tube is divided into double-headed double-sealed and single-head welding, single-head welding is more common.

The outer diameter of clamp pressure sound tube is generally 50,54,57mm three models, which is the same as other types of sound tube, wall thickness between 0.8-2.0mm, why the wall thickness of the clamp pressure sound tube can not To achieve more than 2.0, it is necessary to start from the principle of the use of clamp pressure sound tube. Clamp-type sound tube is the use of hydraulic clamp deformation of the pipe, the junction is clamped into two large, the middle is small, so that the connection is blocked once in a row, the principle of sealing is the rubber O-ring radial shrink hold, pull-out principle The position of the clamp pressure is deformed, and the middle and small ends are large. Avoid the possibility of loose joints. The performance in both pull-out resistance and torque resistance is quite stable and excellent, and the protrusion is rounded and the degree of protrusion is small, which effectively avoids colliding with the catheter, vibrator, and the like. When the wall thickness reaches 2.0 or above, the hydraulic clamp can not successfully flatten the sound tube, and the pressure can not be pressed in place at the time. Therefore, the sealability and the pull-out resistance of the sound tube cannot be guaranteed.

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2. Medium Pressure: 300-380° C, Pressure :3.0-4.0Mpa,
3. Low Pressure: 200-250° C. Pressure: 2.0-2.5Mpa
Type:
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1500×1500mm;1500×1000mm;1540x1360mm

1270×1300mm; 3810×1300mm

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Item	XB510	XB450	XB400	XB350	XB300	XB200
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Aging coefficient                   ≥	0.9
Loss on ignition/%                  ≤	28.0			30.0
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Creep relaxation rate/%             â‰¤	50
Density(g/cm3)	1.6~2.0

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