CN104227251A - Pipeline skylight forming welding method - Google Patents

Abstract

The invention discloses a pipeline skylight forming welding method, which has the concrete technical scheme that an inner bevel opening is formed; places capable of being welded of a pipe opening are welded; a skylight is formed; the welding is carried out inside a pipeline; the inside welding quality is inspected; ultrasonic waves are used for inspecting the welding quality in the position, and after the qualification, welding slag inside the pipeline is cleaned; the skylight is recovered. The pipeline skylight forming welding method provided by the invention has the advantages that the welding process is simple, economy and practicability are realized, and particularly, high practicability is realized during buried pipeline welding.

Description

Pipeline puts in a skylight welding method

Technical field

The invention belongs to carbon steel piping welding field, especially relate to pipeline and to put in a skylight welding method.

Background technology

In existing Pipe installing industry, particularly in buried pipeline installation process, because Pipe installing carries out in trench, when duct bottom docking port is welded with, be close to trench, cause this section of mouth of pipe cannot welding.

Summary of the invention

Technical problem to be solved by this invention is to provide pipeline and puts in a skylight welding method, and welding process is simple, economical and practical, is particularly very practical when buried pipeline welds.

For achieving the above object, inventive pipeline puts in a skylight welding method, and its concrete technical scheme is:

One, interior groove is beaten: the duct bottom inner spout installed will be needed to adopt flame machining, form V-shaped groove, and clear up the iron filings under the cutting of groove place;

Two, the place that line up can weld is welded: be grouping in pipe trench by handle well two pipelines, and group be welded the place that can directly weld at mouth of pipe outward flange after completing;

Three, put in a skylight: use flame cutting knife to cut out a diameter 100mm arc plate on mounted pipeline top, the arc plate cut down is taken out;

Four, welding at pipe interior: determine from pipe interior the particular location that the mouth of pipe cannot weld, adopting manual electric arc welding from pipe interior to welding herein;

Five, interior welds quality is checked: welded and rear cleared up, polished in this welding position, place; Ultrasonic wave is used to check this place's welding quality, qualified rear cleaning place pipe interior welding slag;

Six, skylight is recovered: diameter 100mm arc plate is covered by the former state under cutting and welded gap.

 

Pipeline proposed by the invention puts in a skylight welding method, and welding process is simple, economical and practical, is particularly very practical when buried pipeline welds.

Accompanying drawing explanation

Fig. 1: weld schematic diagram after the perforate of pipeline skylight.

Fig. 2: arc plate schematic diagram.

Detailed description of the invention

See accompanying drawing, inventive pipeline puts in a skylight welding method, and its concrete technical scheme is:

One, interior groove is beaten: the duct bottom inner spout installed will be needed to adopt flame machining, form V word

Shape groove 3, the iron filings under the cutting of cleaning groove place;

Two, the place that line up can weld is welded: be grouping in pipe trench by handle well two pipelines 2, and group be welded the place that can directly weld at mouth of pipe outward flange after completing;

Three, put in a skylight: use flame cutting knife to cut out a diameter 100mm arc plate 1 on mounted pipeline top, the arc plate cut down is taken out;

Four, welding at pipe interior: determine from pipe interior the particular location that the mouth of pipe cannot weld, adopting manual electric arc welding from pipe interior to welding herein;

Five, interior welds quality is checked: welded and rear cleared up, polished in this welding position, place; Ultrasonic wave is used to check this place's welding quality, qualified rear cleaning place pipe interior welding slag;

Six, skylight is recovered: diameter 100mm arc plate is covered by the former state under cutting and welded gap.

In the ironmaking of Changzhou steel mill, make steel in public auxiliary confession, draining buried pipeline installation system, adopt this kind of welding method at the position of indivedual difficult welding, all obtain good effect, conduit running is normal, in pipeline pressure testing inspection process, all do not find Seepage.

Pipeline proposed by the invention puts in a skylight welding method, and welding process is simple, economical and practical, is particularly very practical when buried pipeline welds.

Claims (1)

1. pipeline puts in a skylight welding method, and its concrete technical scheme is:

One, interior groove is beaten: the duct bottom inner spout installed will be needed to adopt flame machining, form V-shaped groove, and clear up the iron filings under the cutting of groove place;

Two, the place that line up can weld is welded: be grouping in pipe trench by handle well two pipelines, and group be welded the place that can directly weld at mouth of pipe outward flange after completing;

Three, put in a skylight: use flame cutting knife to cut out the arc plate of a diameter 100mm on mounted pipeline top, the arc plate cut down is taken out;

Four, welding at pipe interior: determine from pipe interior the particular location that the mouth of pipe cannot weld, adopting manual electric arc welding from pipe interior to welding herein;

Five, interior welds quality is checked: welded and rear cleared up, polished in this welding position, place; Ultrasonic wave is used to check this place's welding quality, qualified rear cleaning place pipe interior welding slag;

Six, skylight is recovered: diameter 100mm arc plate is covered by the former state under cutting and welded gap.