﻿ 油气长输管道焊接方法及焊材用量计算

# 油气长输管道焊接方法及焊材用量计算Welding Method and Welding Material Consumption Calculation of Long-Distance Oil and Gas Transmission Pipeline

Abstract: In this paper, the welding installation methods of long-distance oil and gas transmission pipeline are summarized briefly. The characteristics of welding materials used in different welding processes are analyzed. The theoretical formula of welding material consumption is corrected, and the final correction formula is obtained. The welding material consumption of different welding processes is calculated. It could provide guide for the construction.

1. 引言

2. 焊材用量计算

2.1. 焊条电弧焊

$G=AL\rho \left(1+Kb\right)/\left(106Kn\right)$ (1)

$G=AL\rho /\left(1-Ks\right)/106$ (2)

$\rho$ ——焊条金属密度，7.85 g/cm3；Kb——药皮的质量系数，取25%~40%；

Kn——金属由焊条到焊缝的转熔系数，包括燃烧、飞溅损失为5%~10%，未利用的焊条头损失为10%~15%，故转熔系数取0.75~0.85。

Ks——焊条的损失系数，取0.33~0.6。

$G=AL\rho \left(1+Kb\right)/\left(106Kn\right)×1.1×1.2$ (3)

$G=\pi DA\rho \left(1+Kb\right)/\left(106Kn\right)×1.1×1.2$ (4)

Figure 1. Diagram of welding position schematic

Table 1. Calculation of welding materials consumption in Tie Da safety reformation project (Anshan-Dalian)

2.2. 自保护药芯焊丝半自动焊

$G=AL\rho /\left(1000Kn\right)$ (5)

$G=3.14DA\rho /\left(1000Kn\right)×1.10×1.05$ (6)

Table 2. Calculation of welding materials consumption in Myanmar-China oil & gas pipeline project

2.3. 全自动焊

Table 3. Calculate welding materials consumption with Excel table formula

3. 计算结果分析

4. 结论

[1] 徐小兵. 油气长输管道工程施工技术手册[M]. 北京: 石油工业出版社, 2011: 27-29.

[2] 扎伊采夫, 著. 长输管道焊接安装工程手册[M]. 李荣恩, 译. 北京: 石油工业出版社, 1991: 53.

[3] 王勤民, 孟庆峰, 章雪峰, 等. 石油建设安装工程预算定额(第九册)长距离输送管道工程[M]. 北京: 石油工业出版社, 2014: 197-199.

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