Title:
METHOD AND SYSTEM FOR TESTING RESIDUAL SERVICE LIFE OF PIPE
Document Type and Number:
WIPO Patent Application WO/2019/169833
Kind Code:
A1
Abstract:
A method and system for testing the residual service life of a pipe. The method for testing the residual service life of a pipe comprises: acquiring a strain hardening modulus value of at least three polyethylene materials with a known design service life T (S10); according to the strain hardening modulus value and the design service life T, building a function T = a0 + a1 × + a2 × 2 +...+ an × n, wherein a0, a1, a2... an are pre-set coefficients, and n is a pre-set highest degree of the function and is a positive integer (S20); acquiring a test sample (a) from an in-service pipe (S30); measuring a strain hardening modulus value of the test sample (a) (S40); substituting the strain hardening modulus value of the test sample (a) into the function to replace the strain hardening modulus value , so as to calculate a service life as the residual service life of the test sample (a) (S50). The residual service life of the test sample (a) can be obtained to serve as a residual service life reference value of an in-service pipe which fails due to slow crack propagation, and the risk of the in-service pipe failing due to slow crack propagation is discovered in time.
Inventors:
YANG BO (CN)
WANG ZHIGANG (CN)
LI MAODONG (CN)
ZHAI WEI (CN)
LI SHIPING (CN)
HUANG GUOJIA (CN)
ZHANG SHUANGHONG (CN)
DA JING (CN)
DING JINSEN (CN)
TU XIN (CN)
WU ZHENLING (CN)
HE YINGYI (CN)
WANG ZHIGANG (CN)
LI MAODONG (CN)
ZHAI WEI (CN)
LI SHIPING (CN)
HUANG GUOJIA (CN)
ZHANG SHUANGHONG (CN)
DA JING (CN)
DING JINSEN (CN)
TU XIN (CN)
WU ZHENLING (CN)
HE YINGYI (CN)
Application Number:
PCT/CN2018/101826
Publication Date:
September 12, 2019
Filing Date:
August 22, 2018
Export Citation:
Assignee:
GUANGZHOU SPECIAL PRESSURE EQUIPMENT INSPECTION & RES INST (CN)
International Classes:
G01N17/00
Foreign References:
| CN107449675A | 2017-12-08 | |||
| CN103323343A | 2013-09-25 | |||
| CN102183407A | 2011-09-14 | |||
| CN107290270A | 2017-10-24 | |||
| CN104266961A | 2015-01-07 | |||
| JP2011099701A | 2011-05-19 |
Attorney, Agent or Firm:
LIFANG & PARTNERS (CN)
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