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Corrugated Thread Acoustic Pipe

Summaryandcontentsofultrasonicpipes:ultrasonicpipesaretheuniquereliablesystemappliedtoultrasonictestingonthemarket.Basicconcept:afterprofessionalmolding,rigidsteelpipes(ifthereisnohardnessofpipefixing
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Summary and contents of ultrasonic pipes: ultrasonic pipes are the unique reliable system applied to ultrasonic testing on the market. Basic concept: after professional molding, rigid steel pipes (if there is no hardness of pipe fixing wall-thickness steel pipes, there is no strength) have a reliable anti-seepage effect in the process of pouring concrete in the modes of fastening connection, forcipressure connection, spiral connection, etc. Finished ultrasonic pipes usually include molded steel pipes with the standard length of 9M, 6M and 3M as well as a connection joint. A channel can be reserved, so the detection head can reach the bottom of the pile foundation directly.

 

Features:

I. Simple connection: they are flexibly connected by screws and nuts without preparation except tasks outside construction sites as well as any equipment, are simple, convenient and fast (5 times that of the traditional methods), can be easily fixed onto steel reinforcement cage shelves, and cannot be influenced by adverse weather.

II. Convenient and fast construction: it belongs to one of the fastest pipes in acoustic pipe connection modes, in which Φ50*1.2mm acoustic pipes have the tensile resistance of 5.9 tons.

III. Professional design: 100% quality monitoring before delivery, convenient test on construction sites

IV. Save costs and preparation time without technicians, and reduce losses (short pipes of different models can be customized according to customer requirements) without space limit.

V. Quickness: standard pipes can be supplied at any time. Construction sites can be entered within 24 hours.

VI. Safety: welding is not required to be conducted on construction sites.

 

Specification:

Note: DF represents Dengfeng; SZG represents ultrasonic testing pipes; 50, 53 and other numbers represent outer diameter; -I represents wall thickness; LX represents spiral.

Product number Nominal diameter(mm) Wall thickness(mm)
length(mm)
DFSZG-50-10-LX 50 1.0 3000 6000 9000 1200
DFSZG-50-12-LX 50 1.2 3000 6000 9000 1200
DFSZG-50-15-LX 50 1.5 3000 6000 9000 1200
DFSZG-53-10-LX 53 1.0 3000 6000 9000 1200
DFSZG-53-15-LX 53 1.5 3000 6000 9000 1200
DFSZG-53-20-LX 53 2.0 3000 6000 9000 1200
DFSZG-57-20-LX 57 2.0 3000 6000 9000 1200
DFSZG-57-25-LX 57 2.5 3000 6000 9000 1200
DFSZG-57-30-LX 57 3.0 3000 6000 9000 1200
DFSZG-60-25-LX 60 2.5 3000 6000 9000 1200
DFSZG-60-30-LX 60 3.0 3000 6000 9000 1200

 

Technical Parameters:

Project JT/T705-2007 Standard
Appearance Check whether there are burred, cracked, scabbed, folded, layered, scratched, scuffed, burnt and thin oxide skin with overlap welding defects and staggered welding seams through visual inspection and handfeel. The bending degree is not more than 5mm/m.
Dimensions Outer diameter ±1.0%
Wall thickness ±5%
Tensile strength(MP) ≥315MP
Tensile test (elongation) ≥14%
Flattening Test When the distance between two flattened plates is 3/4 of outer diameter of the acoustic pipe, cracks cannot be formed.
Bending Test When stuffing is not filled in the acoustic pipe, the bending radius is 6 times that of nominal outside diameter, the bending angle is 120°, and the acoustic pipe cannot be cracked.
Hydraulic Test When the water injection pressure of seals at the two ends of the acoustic pipe is 5MP, the acoustic pipe does not leak.
Vortex Damage The welding seam of the acoustic pipe does not have sand holes and cracks.
Sealing Test Outer pressure P=215S/D, no leakage, no deformation at the interface
Inner pressure P=215S/D, no leakage, no deformation at the interface
Pull-out Test It should bear the drawing force of 3,000N at normal temperature. The connection parts can be kept without loose and breaking after 60min continuous actions.
Vibration Test Under the test pressure of 1.2MP, it can continuously vibrate for 100,000 times without any leakage and falling phenomena at the joint.
Torque Test Torsion torque of 120N.m can be kept for 10min without the slip of joints.
Hardness Test The wall hardness of acoustic pipe: HRB≥90

 

Construction technology:

In the principle of “Reliability, Convenience”, the testing pipe is spliced and hung in the process of manufacturing reinforcing steel bars, then connected and positioned when the reinforcing steel bars are laid, and first positioned in the bottom cage in a welding mode together with the steel reinforcement cage, with the upper part bundled by steel wires (one circle for every 2-3m), to ensure the testing pipe can be positioned vertically, facilitate in pile foundation testing and prevent concrete guide pipes from colliding.

I. Test the fixed length of pipes.

Test the length of pipes according to the length of the steel reinforcement cage; the bottom pipe should be 20-30cm longer than a steel reinforcement bottom cage.

II. Test the installation of the pipe bottom cage.

The bottom pipe of the testing pipe is equipped with a movable clamp, is positioned according to actual construction conditions, and then is welded onto the steel reinforcement cage, to fix the testing pipe, thus preventing the testing pipe from floating upwards and rotating.

III. Test the cage installation in the pipe.

A connection pipe in the testing pipe is mounted after the steel reinforcement cage is molded; the upper point of the testing pipe is flexibly positioned according to U-shaped reinforcing steel bars, and can slide up and down. One end of the socket is positioned by an S-shaped steel reinforcement hook. During installation of the steel reinforcement cage, the S-shaped hook is taken down; the testing pipe slides down, is inserted into the bottom pipe, and is fixed by tightening the nut through a wrench. The middle part is bundled and fixed by iron wires every 2-3m, and the forth.

IV. Test the installation of the pipe top cage.

After the steel reinforcement top cage is installed, all the joints of pipes should be tested completely, to ensure firm tightening. Clear water must be filled in the testing pipe, and finally special seal heads are screwed on, to complete all the operation processes.

V. Test the pipe when the pile foundation is in semi-cage installation.

The testing pipe can be welded and positioned in different sections according to actual conditions, which facilitates in the positioning of steel reinforcement hoops, and can also be installed without a steel reinforcement cage. Compared with other connection joints, it can save about 3 reinforcing steel bars, which is safe and convenient.

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