Welding technology of steel pipe and flange

A welding process and steel pipe technology, applied in welding equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of high quality requirements, low work efficiency, and difficult welding of steel pipes and flanges, and achieve simple steps, convenient operation, The effect of ensuring the quality of welding engineering

Inactive Publication Date: 2019-07-09
姜玉娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The welding of steel pipes and flanges is difficult and requires high quality, which puts high demands on welders and technicians. The general welding process cannot pass the testing equipment 100%, and the work efficiency is low.

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach

[0019] A specific implementation of the welding process between the steel pipe and the flange of the present invention includes the following steps: when welding, there are certain requirements for the environment: when the wind speed is greater than 2M / S, measures to keep out the wind should be taken, otherwise welding is prohibited; It shall not be greater than 90%; the welding work shall be stopped as far as possible before the rain comes.

[0020] A. Cleaning before welding: Before welding, the welder must remove the scale, rust,

[0021] Moisture, oil and other impurities are removed;

[0022] B. Preheating before welding: the preheating temperature is 175°C -225°C, the interlayer temperature shall not exceed 250°C, and the weld seam in the heating area of ​​the medium and thick plate shall not be less than 100mm. Use a thermometer to measure the temperature within 100mm around the weld seam is monitored, the warm-up reaches

[0023] The welding seam after the requireme...

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PUM

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Abstract

The invention discloses a welding technology of a steel pipe and a flange. The welding technology comprises the following steps that cleaning works are conducted before welding; preheating is conducted before welding; welding is conducted, firstly the position of 1/4 circle on the steel pipe is drawn, then the flange is welded to the position, a welding method of single-side welding and double-side forming is adopted to symmetrically weld three batches, then the flange is removed, and then welding issequentially conducted; and treatment is conducted after welding. The welding technology of thesteel pipe and the flange has the advantages that operation is convenient, time and labor are saved, safety and reliability are achieved, forming is good, and the work efficiency is improved.

Description

technical field [0001] The invention relates to a welding process, which is suitable for the welding process of steel pipes and flanges in a pipe-laying ship. Background technique [0002] Welding steel pipes and flanges is difficult and requires high quality, which puts high demands on welders and technicians. The general welding process cannot pass the testing equipment 100%, and the work efficiency is low. Contents of the invention [0003] The purpose of the present invention is to overcome the above disadvantages and provide a welding process for steel pipes and flanges that is easy to operate, saves time and effort, is safe and reliable, has good shape, and improves work efficiency. [0004] The purpose of the present invention is achieved through the following technical solutions: a welding process for a steel pipe and a flange, comprising the following steps: [0005] A. Cleaning before welding: Before welding, the welder must clean the scale, rust, water, oil and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02B23P15/00
CPCB23K31/02B23P15/00
Inventor 姜玉娟
Owner 姜玉娟
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