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Welding method of tp347 high pressure thick wall stainless steel pipe

A welding method and stainless steel technology, applied in welding equipment, welding equipment, auxiliary welding equipment, etc., can solve the problems of inability to guarantee processing accuracy and time-consuming, and achieve the effect of reducing labor input, good cleaning efficiency, and improving welding quality.

Active Publication Date: 2021-11-16
THE SIXTH CONSTR CO LTD OF CHINA NAT CHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the improvement of manufacturing technology in domestic steel mills, TP347 materials are gradually localized, and pipe materials are gradually becoming thicker. It takes a long time to process the groove by traditional manual grinding, and the processing accuracy cannot be guaranteed.

Method used

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  • Welding method of tp347 high pressure thick wall stainless steel pipe
  • Welding method of tp347 high pressure thick wall stainless steel pipe
  • Welding method of tp347 high pressure thick wall stainless steel pipe

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the embodiments, so that those skilled in the art can implement it with reference to the description.

[0032] Such as Figure 1-3 As shown, the welding method of TP347 high-pressure thick-walled stainless steel pipeline includes the following steps:

[0033] Step 1. Pipe groove processing: Use groove machine to process the groove of the two pipes to be welded, and the groove is double V-shaped;

[0034] Step 2. Cleaning the groove of the pipeline: firstly, the groove is polished and cleaned, and then the nozzle of the pipeline with the groove is placed in a sodium hydroxide solution with a mass fraction of 5% for 2 hours using a soaking device. include:

[0035] Support 101, which can be raised and lowered (helping to make the sprint device suitable for pipes of different diameters), the bottom end of the support 101 is provided with moving wheels, so as to facilitate the movement of ...

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Abstract

The invention discloses a welding method for TP347 high-pressure thick-walled stainless steel pipes, which includes the following steps: Step 1, pipe bevel processing: two pipes to be welded are processed by a bevel machine, and the bevels are double V-shaped; Step 2. Cleaning the groove of the pipeline: firstly, the groove is polished and cleaned, and then the nozzle of the pipeline with the groove is placed in a sodium hydroxide solution with a mass fraction of 5% for 2 hours using a soaking device. Including: bracket, cleaning tank, outer sealing component, cleaning component, inner sealing component; step 3, pipe pairing: pair the two pipes to be welded, and pair the two V-shaped grooves on the outside to form the outer pairing slope and fix the outer pair of grooves by spot welding, and the two V-shaped groove pairs on the inner side form the inner pair of grooves; Step 4, pipe welding. The invention processes the bevel by means of a beveling machine, which can effectively improve the welding quality, reduce labor input and improve construction efficiency.

Description

technical field [0001] The invention relates to the field of pipeline welding. More specifically, the present invention relates to a welding method of TP347 high-pressure thick-walled stainless steel pipe. Background technique [0002] TP347 stainless steel pipe is an austenitic stainless acid-resistant steel. TP347 has good corrosion resistance in acid, alkali, salt and other solutions, so it is widely used in aviation, petrochemical and other industries. At first, TP347 was imported as a foreign material. According to the different imported processes, it was divided into two types: stabilized heat treatment after welding and no stabilization heat treatment after welding. The wall thickness is basically below 30mm. With the improvement of manufacturing technology in domestic steel mills, TP347 materials are gradually localized, and pipe materials are gradually becoming thicker. It takes a long time to process the groove by traditional manual grinding, and the processing ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K31/02B23K37/00
CPCB23K31/02B23K37/00B23K2101/06
Inventor 赵青姚永泽王三妹胡舒畅霍国涛刘洋洋桂涛常立新曹建军
Owner THE SIXTH CONSTR CO LTD OF CHINA NAT CHEM ENG
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