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Method and system for testing minimum bending radius of full-size nonmetal pipe

A bending radius, testing system technology, applied in the direction of using stable tension/pressure to test the strength of materials, measuring devices, analyzing materials, etc., can solve problems such as inability to test and determine, and achieve simple and feasible testing methods, high degree of automation, and setting Simple and easy effects

Active Publication Date: 2015-09-09
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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  • Method and system for testing minimum bending radius of full-size nonmetal pipe
  • Method and system for testing minimum bending radius of full-size nonmetal pipe
  • Method and system for testing minimum bending radius of full-size nonmetal pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1: Test the minimum storage bending radius of DN150 polyethylene pipes 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 test machine;

[0058] (3) Placing the sample: first, select a suitable clamping block according to the outer diameter of the test tube sample, and clamp the middle part of the test tube sample in the tube holder; adjust the height of the two adjustable fixed piles to ensure that the transmission rod and 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, and complete the clamping and fixing of the two ends of the test tube sample.

[0059] (4) Bending system setting: Set the distance between the two fixing bolts as the chord ...

Embodiment 2

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

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

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

[0066] (3) Placing the sample: first, select a suitable clamping block according to the outer diameter of the test tube sample, and clamp the middle part of the test tube sample in the tube holder; adjust the height of the two adjustable fixed piles to ensure that the transmission rod and 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, and complete the clamping and fixing of the two ends of the test tube sample.

[0067] (4) Bending system setting: The distance betwe...

Embodiment 3

[0071] Example 3: Verifying the minimum storage bending radius of DN150 polyethylene pipes at room temperature

[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 test machine;

[0074] (3) Placing the sample: first, select a suitable clamping block according to the outer diameter of the test tube sample, and clamp the middle part of the test tube sample in the tube holder; adjust the height of the two adjustable fixed piles to ensure that the transmission rod and 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, and 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 as the c...

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Abstract

The invention discloses a method and a system for testing the minimum bending radius of a full-size nonmetal pipe. According to the fundamental principle of the method, a tested pipe is repeatedly bent in a reciprocating way, or the tested pipe is fixed on a bending test platform, load is applied to enable the tested pipe to bend to a certain bending radius, and then the pressure bearing performance of the nonmetal pipe in an adjusted bending state or a certain bending radius state can be tested by a hydrostatic pressure and bursting test system, and the minimum storage bending radius and the minimum working bending radius of the nonmetal pipe can be evaluated according to the hydrostatic performance and the short-time invalidation pressure value.

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-scale 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 pipes in coils, which greatly saves laying costs; at the same time, it enables the storage and transportation of long-distance pipes. become 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 radius), each comp...

Claims

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Application Information

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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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