A method and system for testing the minimum bending radius of a full-scale non-metallic pipe

A technology of bending radius and testing system, applied in the direction of applying stable tension/pressure to test material strength, measuring device, analyzing materials, etc., can solve problems such as inability to test and determine, and achieve simple and feasible test methods, simple and easy settings, The effect of high degree of automation

Active Publication Date: 2017-11-07
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the minimum bending radius of the pipe is not clear, it cannot be determined through experiments with this device

Method used

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  • A method and system for testing the minimum bending radius of a full-scale non-metallic pipe
  • A method and system for testing the minimum bending radius of a full-scale non-metallic pipe
  • A method and system for testing the minimum bending radius of a full-scale non-metallic pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1: Test the minimum storage bending radius of DN150 polyethylene pipe at room temperature

[0056] (1) Sample preparation: take a polyethylene pipe with a length of 1000mm as the test pipe sample;

[0057] (2) Pipe connection: connect the processed polyethylene pipe to the hydrostatic blasting tester;

[0058] (3) Place the sample: first select the appropriate clamping block according to the outer diameter of the test tube sample, and clamp the middle of the test tube sample in the clamp; adjust the height of the two adjustable fixed piles to ensure that the transmission rod is The center of the test tube sample is on the same horizontal line; according to the length and outer diameter of the test tube sample, determine the position of the fixing bolt and the sliding bolt to complete the clamping and fixing of the two ends of the test tube sample.

[0059] (4) Setting of the bending system: Set the distance between the two fixing bolts to the chord length, combine with ...

Embodiment 2

[0063] Example 2: Test the minimum working bending radius of DN100 flexible composite pipe at 50°C

[0064] (1) Sample preparation: take a flexible composite tube with a length of 1200mm as the test tube sample;

[0065] (2) Pipe connection: connect the processed flexible composite pipe to the hydrostatic blasting tester;

[0066] (3) Place the sample: first select the appropriate clamping block according to the outer diameter of the test tube sample, and clamp the middle of the test tube sample in the clamp; adjust the height of the two adjustable fixed piles to ensure that the transmission rod is The center of the test tube sample is on the same horizontal line; according to the length and outer diameter of the test tube sample, determine the position of the fixing bolt and the sliding bolt to complete the clamping and fixing of the two ends of the test tube sample.

[0067] (4) Setting of the bending system: Set the distance between the two fixing bolts as the chord length, and cal...

Embodiment 3

[0071] Example 3: Verify the minimum storage bending radius of DN150 polyethylene pipe under room temperature conditions

[0072] (1) Sample preparation: take a polyethylene pipe with a length of 1000mm as the test pipe sample;

[0073] (2) Pipe connection: connect the processed polyethylene pipe to the hydrostatic blasting tester;

[0074] (3) Place the sample: first select the appropriate clamping block according to the outer diameter of the test tube sample, and clamp the middle of the test tube sample in the clamp; adjust the height of the two adjustable fixed piles to ensure that the transmission rod is The center of the test tube sample is on the same horizontal line; according to the length and outer diameter of the test tube sample, determine the position of the fixing bolt and the sliding bolt to complete the clamping and fixing of the two ends of the test tube sample.

[0075] (4) Bending system setting: Set the distance between the two fixing bolts to the chord length, and ...

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Abstract

The invention discloses a method and system for testing the minimum bending radius of a full-size non-metallic pipe. The basic principle of the method is to repeatedly bend the test pipe back and forth, or fix the test pipe on a bending test platform, and apply a load to make it bend To a certain bending radius, and then through the hydrostatic pressure and burst test system to test the pressure bearing performance of the non-metallic pipe after the bending state is adjusted or under a certain bending radius state, and the non-metallic pipe is evaluated by the hydrostatic performance and short-term failure pressure value The minimum storage bend radius and the minimum working bend radius of the tubing.

Description

Technical field [0001] The invention relates to the technical field of minimum bending radius testing and verification, in particular to a method and system for testing the minimum bending radius of a full-size non-metallic pipe. Background technique [0002] Non-metallic pipes with excellent corrosion resistance are becoming an important choice for oil and gas gathering and transportation pipelines. The biggest advantage of non-metallic pipes, especially reinforced thermoplastic composite pipes, is that they are flexible and have a small bending radius. This advantage makes it possible to lay the pipe by the coil method, which greatly saves the laying cost; at the same time, it enables the storage and transportation of long-distance pipes It becomes very convenient. However, during the storage, installation and normal use of non-metallic pipes, when the bending exceeds its minimum bending radius (including the minimum storage bending radius and the minimum working bending radiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/26G01N3/12
Inventor 李厚补张学敏戚东涛羊东明魏斌朱原原
Owner BC P INC CHINA NAT PETROLEUM CORP
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