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Main steam and main water supply pipeline in a conventional island of nuclear power plants and preparation method thereof

A technology for main water supply and main steam, which is applied to the main steam main water supply pipeline of conventional islands in nuclear power plants and its preparation field, can solve the problems of high cost, poor "FAC" resistance, and low pipe strength.

Inactive Publication Date: 2014-07-16
中广核工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] To sum up, the conventional island main steam main water supply pipes of nuclear power plants in the prior art have the following defects: high cost, poor performance against "FAC", and low pipe strength

Method used

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  • Main steam and main water supply pipeline in a conventional island of nuclear power plants and preparation method thereof
  • Main steam and main water supply pipeline in a conventional island of nuclear power plants and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] The conventional island main steam main water supply pipe of the nuclear power plant in this embodiment may be referred to as the WB36CN1 model (the same below).

[0093] The conventional island main steam main water supply pipeline of the nuclear power plant in this embodiment, the material ratio of the main water supply pipeline includes by weight percentage:

[0094] C: 0.06~0.20%; Mn: 0.70~1.30%; P: 0~0.020%; S: 0~0.006%; Si: 0.20~0.60%; Cr: 0.15~0.35%; : 0.90~1.40%; Cu: 0.40~0.90%; Nb: 0.008~0.035%; N: 0~0.021%; Al: 0~0.055%; the rest is Fe and unavoidable impurities.

[0095] Preferably, it includes by weight percentage: C: 0.08-0.19%; Mn: 0.75-1.25%; P: 0-0.020%; S: 0-0.006%; Si: 0.21-0.54%; Cr: 0.15-0.35% ;Mo: 0.20~0.45%; Ni: 0.95~1.35%; Cu: 0.45~0.85%; Nb: 0.010~0.030%; N: 0~0.021%; Al: 0~0.055%; the rest is Fe and unavoidable Impurities.

[0096] For example, C: 0.08%; Mn: 0.75%; P: 0.01%; S: 0.002%; Si: 0.21%; Cr: 0.14%; Mo: 0.20%; Ni: 0.95%; %; N: 0.01%;...

Embodiment 2

[0101] The conventional island main steam main water supply pipeline of the nuclear power plant in this embodiment includes by weight percentage:

[0102] C: 0.06%; Mn: 0.70%; P: 0.020%; S: 0.006%; Si: 0.20%; Cr: 0.15%; Mo: 0.15%; Ni: 0.90%; N: 0.021%; Al: 0.055%; the rest is Fe and unavoidable impurities. Others are the same as in Example 1.

Embodiment 3

[0104] The conventional island main steam main water supply pipeline of the nuclear power plant in this embodiment includes by weight percentage:

[0105] C: 0.20%; Mn: 1.30%; P: 0.01%; S: 0.004%; Si: 0.60%; Cr: 0.35%; Mo: 0.50%; Ni: 1.40%; N: 0.011%; Al: 0.03%; the rest is Fe and unavoidable impurities. Others are the same as in Example 1.

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Abstract

The present invention discloses a main steam and main water supply pipeline in a conventional island of nuclear power plants and a preparation method thereof. The main water supply pipeline comprises the following components in percentage by weight: 0.06-0.20% of C, 0.70-1.30% of Mn, 0-0.020% of P, 0-0.006% of S, 0.20-0.60% of Si, 0.15-0.35% of Cr, 0.15-0.50% of Mo, 0.90-1.40% of Ni, 0.40-0.90% of Cu, 0.008-0.035% of Nb, 0-0.021% of N, 0-0.055% of Al and the balance of Fe and unavoidable impurities. The preparation method comprises the following two methods, namely, directly rolling pipes on a periodic mill and carrying out pipe cross-rolling piercing on a forging blank. The main steam and main water supply pipeline disclosed by the invention has the advantages of good FAC (Flow Accelerated Corrosion) resistance, good mechanical properties at room temperature and tensile properties at high temperature and impact toughness at low temperature.

Description

technical field [0001] The invention relates to a pipeline and a preparation method thereof, more specifically, to a conventional island main steam main water supply pipeline of a nuclear power plant and a preparation method thereof. Background technique [0002] my country's steel production ranks first in the world, but my country's conventional thermal power high-pressure pipelines have always relied on foreign imports, which not only makes the country spend a lot of foreign exchange, but also profits are earned by foreign companies, and foreign companies monopolize the production of high-pressure steel pipes for power stations. As a result, the price of high-pressure steel pipes continues to rise, which has a great impact on the cost control of domestic power station construction. [0003] Compared with thermal power high-pressure pipelines, the pressure and temperature parameters of the tube medium (saturated steam or slightly superheated steam) used in nuclear power con...

Claims

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Application Information

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IPC IPC(8): C22C38/48C22C33/04C21D8/10C21D1/25C21D1/28
Inventor 张金平邓小云
Owner 中广核工程有限公司
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