Title:
METHOD FOR ASSESSING REMAINING SERVICE LIFE OF PIPE
Document Type and Number:
WIPO Patent Application WO/2016/151953
Kind Code:
A1
Abstract:
Provided is a method for assessing the remaining service life of a pipe which makes it possible to assess the remaining service life of a pipe using a simple and quick operation. The method has: a pipe inner-diameter derivation step (S1) for deriving the inner diameter (D) of a pipe; a pipe inner-diameter deformation amount derivation step (S2) for deriving the inner-diameter deformation amount (ΔD) from the difference between the inner diameter of the pipe and the initial inner diameter (D0) of the pipe; a deformation projection diagram creation step (S3a) for creating a deformation projection diagram under the condition that the pipe swelling reaches a service-life expansion limit (X) at an arbitrary assessed remaining service life (T); a determination standard deformation amount acquisition step (S3b) for acquiring the deformation amount (A) obtained when deriving the inner diameter of the pipe during the pipe inner-diameter derivation step, as a standard for determining the presence/absence of the assessed remaining service life, on the basis of the deformation projection diagram; a cumulative error calculation step (S3c) for calculating the cumulative error (B) when deriving the pipe inner diameter; and a remaining service life determination step (S4) for determining the remaining service life of the pipe on the basis of the pipe inner-diameter deformation amount, the deformation amount, which serves as the standard for determining the presence/absence of the assessed remaining service life, and the cumulative error.
Inventors:
MORIOKA SHINYA (JP)
IWASAKI SHUGO (JP)
TSUTSUMI HIROKAZU (JP)
KATAYAMA TETSUJI (JP)
IWASAKI SHUGO (JP)
TSUTSUMI HIROKAZU (JP)
KATAYAMA TETSUJI (JP)
Application Number:
PCT/JP2015/084234
Publication Date:
September 29, 2016
Filing Date:
December 07, 2015
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
International Classes:
G01M99/00
Foreign References:
| JP2007225292A | 2007-09-06 | |||
| JP2010203919A | 2010-09-16 | |||
| JP2013122411A | 2013-06-20 | |||
| JPH09159582A | 1997-06-20 | |||
| JP2013120183A | 2013-06-17 |
Other References:
TOSHIKAZU SHIBASAKI ET AL.: "Remaining life management of catalyst tubes made of heat resistant cast steel including Nb ( IN 529", THE JAPAN PETROLEUM INSTITUTE SOCHI KENKYU TORONKAI,, vol. 25 th, November 1994 (1994-11-01), pages 43 - 48
Attorney, Agent or Firm:
MITSUISHI, Toshiro et al. (JP)
Toshiro Mitsuishi (JP)
Toshiro Mitsuishi (JP)
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