CN105665886A - Process pipeline welding technique - Google Patents

Abstract

The invention discloses a process pipeline welding technique which comprises the following steps of groove determination, welding of the two sides of a groove, assembly interval determination, tack welding through gas tungsten arc welding (GTAW), bottom sealing through GTAW, secondary cleaning, cosmetic welding, cleaning of welding spatter, qualification determination of appearance self-checking, steel seal number printing, and nondestructive testing. According to the process pipeline welding technique, operation is easy, the requirement for experience of an operator is low, and the product quality is high.

Description

A kind of process pipe welding procedure

Technical field

The present invention relates to a kind of process pipe welding procedure.

Background technology

The adjustment in processing step and device parameter etc. of the existing process pipe welding procedure there is also certain empirical and technical, for the operator newly started with, also need to carry out substantial amounts of exercise and could grasp operation skill, produce the good product of quality.

Summary of the invention

In order to realize the purpose of the present invention, the present invention provides the process pipe welding procedure of a kind of easy to operate, quick, easy left-hand seat;

For solving above-mentioned technical problem, the present invention adopts the following technical scheme that

A kind of process pipe welding procedure, comprises the steps:

Groove confirmation → groove both sides → group to gap confirmation → GTAW tack welding → GTAW back cover → secondary cleaning → cosmetic welding → cleaning splashing welding slag → self-inspection visual examination qualified → play steel seal number → Non-Destructive Testing;

1), argon arc welding welding conditions are shown in following table:

Argon Electricity Federation weldering weldering welding conditions are shown in following table:

2), argon arc welding adopt straight polarity direct current, welding gun air cooling, speed of welding according to welder, is generally 6-8cm/min; 3), weld before, should by clean for polishing around weld bond and dip in acetone line up region with non-dust cloth or silk and be cleaned processing;

4), must one side welding with back formation, the starting the arc with receive arc, the starting the arc adopt reflow method, receive arc should fill up arc crater, the starting the arc must complete in groove, forbids playing arc and the starting the arc on pipeline, pipe fitting mother metal surface. If with receiving arc place, the starting the arc finds that the defect such as pore, crackle should process totally in time; Should stagger mutually in the starting the arc of multiple tracks multilayer welding, receipts arc place;

5), welding time welding gun hypsokinesis and weldment surface angle too small, argon shield effect can be reduced; After first pass bottoming welding completes, second time weld job arcing point welds receipts acnode and staggers more than 50mm with first pass, meets arc place and should ensure that through welding and fusion are good;

6), welding for argon Electricity Federation, the welding procedure of first pass backing welding is the same with the welding procedure of straight argon arc-welding, by welding electrode drying, should dry temperature and be 150 DEG C, be incubated 1 hour, and welding rod is put into heat-preservation cylinder ready access upon use before electric welding capping;

7), after welder's welding, weld appearance should be checked, and conscientiously fill in welding record, to the undesirable weld seam of outward appearance, welder adopts measure to carry out reconditioning, beats steel seal and carries out labelling and carry out non-destructive X-ray carrying out flaw detection, carry out labelling after completing on its line chart after qualified.

The present invention is simple to operate, and operator's skill requirement is low, and product quality is high.

Detailed description of the invention

Below in conjunction with embodiment, the invention will be further described:

A kind of process pipe welding procedure, comprises the steps:

Groove confirmation → groove both sides → group to gap confirmation → GTAW tack welding → GTAW back cover → secondary cleaning → cosmetic welding → cleaning splashing welding slag → self-inspection visual examination qualified → play steel seal number → Non-Destructive Testing;

1), argon arc welding welding conditions are shown in following table:

Argon Electricity Federation weldering weldering welding conditions are shown in following table:

2), argon arc welding adopt straight polarity direct current, welding gun air cooling, speed of welding according to welder, is generally 6-8cm/min; 3), weld before, should by clean for polishing around weld bond and dip in acetone line up region with non-dust cloth or silk and be cleaned processing;

4), must one side welding with back formation, the starting the arc with receive arc, the starting the arc adopt reflow method, receive arc should fill up arc crater, the starting the arc must complete in groove, forbids playing arc and the starting the arc on pipeline, pipe fitting mother metal surface. If with receiving arc place, the starting the arc finds that the defect such as pore, crackle should process totally in time; Should stagger mutually in the starting the arc of multiple tracks multilayer welding, receipts arc place;

5), welding time welding gun hypsokinesis and weldment surface angle too small, argon shield effect can be reduced; After first pass bottoming welding completes, second time weld job arcing point welds receipts acnode and staggers more than 50mm with first pass, meets arc place and should ensure that through welding and fusion are good;

6), welding for argon Electricity Federation, the welding procedure of first pass backing welding is the same with the welding procedure of straight argon arc-welding, by welding electrode drying, should dry temperature and be 150 DEG C, be incubated 1 hour, and welding rod is put into heat-preservation cylinder ready access upon use before electric welding capping;

7), after welder's welding, weld appearance should be checked, and conscientiously fill in welding record, to the undesirable weld seam of outward appearance, welder adopts measure to carry out reconditioning, beats steel seal and carries out labelling and carry out non-destructive X-ray carrying out flaw detection, carry out labelling after completing on its line chart after qualified.

Claims (1)

1. a process pipe welding procedure, it is characterised in that comprise the steps:

Groove confirmation → groove both sides → group to gap confirmation → GTAW tack welding → GTAW back cover → secondary cleaning → cosmetic welding → cleaning splashing welding slag → self-inspection visual examination qualified → play steel seal number → Non-Destructive Testing;

1), argon arc welding welding conditions are shown in following table:

Argon Electricity Federation weldering weldering welding conditions are shown in following table:

2), argon arc welding adopt straight polarity direct current, welding gun air cooling, speed of welding according to welder, is generally 6-8cm/min; 3), weld before, should by clean for polishing around weld bond and dip in acetone line up region with non-dust cloth or silk and be cleaned processing;

4), must one side welding with back formation, the starting the arc with receive arc, the starting the arc adopt reflow method, receive arc should fill up arc crater, the starting the arc must complete in groove, forbids playing arc and the starting the arc on pipeline, pipe fitting mother metal surface; If with receiving arc place, the starting the arc finds that the defect such as pore, crackle should process totally in time; Should stagger mutually in the starting the arc of multiple tracks multilayer welding, receipts arc place;

5), welding time welding gun hypsokinesis and weldment surface angle too small, argon shield effect can be reduced; After first pass bottoming welding completes, second time weld job arcing point welds receipts acnode and staggers more than 50mm with first pass, meets arc place and should ensure that through welding and fusion are good;

6), welding for argon Electricity Federation, the welding procedure of first pass backing welding is the same with the welding procedure of straight argon arc-welding, by welding electrode drying, should dry temperature and be 150 DEG C, be incubated 1 hour, and welding rod is put into heat-preservation cylinder ready access upon use before electric welding capping;

7), after welder's welding, weld appearance should be checked, and conscientiously fill in welding record, to the undesirable weld seam of outward appearance, welder adopts measure to carry out reconditioning, beats steel seal and carries out labelling and carry out non-destructive X-ray carrying out flaw detection, carry out labelling after completing on its line chart after qualified.