-165°C-LOW-TEMPERATURE-RESISTANT REBAR MECHANICAL CONNECTION COUPLER FOR LNG STORAGE TANK AND PRODUCTION METHOD THEREFOR

Title:

-165°C-LOW-TEMPERATURE-RESISTANT REBAR MECHANICAL CONNECTION COUPLER FOR LNG STORAGE TANK AND PRODUCTION METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2021/121109

Kind Code:

A1

Abstract:

Provided are a -165°C-low-temperature-resistant rebar mechanical connection coupler for an LNG storage tank and a production method therefor. The production method involves: subjecting a coupler parent material to inner and outer circle turning → processing a female thread using a tapping machine → quenching → tempering process to prepare the coupler, wherein the components of the parent material include: 0.06-0.12% of C, 0.30-0.50% of Si, 1.30-1.80% of Mn, 1.00-2.50% of Ni, 0.060-1.000% of V, P ≤ 0.010%, S ≤ 0.010%, H ≤ 0.00015%, and O ≤ 0.0015%, with the balance being Fe and impurity elements. The mechanical connection coupler of the present invention is produced using a grade of steel different from the prior art, and the production method is controlled. The produced coupler can satisfy the -165°C-low-temperature resistance requirement for rebar-reinforced concrete structures of LNG, etc., low-temperature storage tanks in China.

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Inventors:

GUO ZHAN (CN)
WANG KAIZHONG (CN)
YU TONGREN (CN)
JIANG TING (CN)
ZHANG XIAORUI (CN)
YU LIANGQI (CN)
SONG ZUFENG (CN)
YIN DEFU (CN)
XU YAN (CN)
HUANG SHEQING (CN)
ZHANG BUHAI (CN)

Application Number:

PCT/CN2020/135058

Publication Date:

June 24, 2021

Filing Date:

December 10, 2020

Export Citation:

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Assignee:

MAANSHAN IRON & STEEL CO LTD (CN)

International Classes:

C22C38/02; B23P15/00; C21C5/52; C21C7/10; C22C33/04; C22C38/04; C22C38/08; C22C38/12

Foreign References:

CN111041361A	2020-04-21
CN103225044A	2013-07-31
JPS5340621A	1978-04-13
CN101545077A	2009-09-30

Attorney, Agent or Firm:

WUHU ANHUI INTELLECTUAL PROPERTY AGENCY LTD (CN)

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