CN201818927U

CN201818927U - Chinese-standard thin-wall stainless steel pipe socket argon tungsten arc welding connecting structure

Info

Publication number: CN201818927U
Application number: CN2010201269050U
Authority: CN
Inventors: 余张法
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-03-10
Filing date: 2010-03-10
Publication date: 2011-05-04
Anticipated expiration: 2020-03-10

Abstract

The utility model relates to an Chinese-standard thin-wall stainless steel pipe socket argon tungsten arc welding connecting structure which is characterized in that a pipe (1) required to be connected is socketed with a connecting pipe fitting (2), the pipe is inserted to a limiting step (3), an argon tungsten arc welding torch is used and aims at a fusion welding step (4) at the end of the pipe, the width of the fusion welding step (4) is 1.0mm for DN15 to DN50 pipes and 2.0mm for DN60 to DN100 pipes, the wall thickness of the fusion welding step (4) is 0.4mm for the DN15 to DN50 pipes and 0.8mm for the DN60 to DN100 pipes, the current of a argon tungsten arc welding machine is controlled to be within 10A to 20A, the fusion welding step is fused at high temperature emitted by the current to connect the pipe with the pipe fitting in a fusing way, and the connecting pipe fitting is a straight-through, three-way, four-way, isodiametric or reducing pipe joint. The welded part of the pipe is attractive and firm, defects such as penetration and nodulation do not occur on the inner wall of the pipe, and the Chinese-standard thin-wall stainless steel pipe socket argon tungsten arc welding connecting structure can be widely used for potable water supply pipeline systems.

Description

GB thin-walled stainless steel tube socket joint argon tungsten-arc welding joint construction

Technical field

The utility model relates to the thin-walled stainless steel tube joint construction, especially a kind of GB GB/T19228.2 thin-wall stainless steel pipeline socket joint argon tungsten-arc welding joint construction.

Background technique

Stainless steel pipe and water pipe are " the green tubing of 21st century ", have pollution-free, high strength, long lifetime, water resistance is little, comprehensive cost is low, characteristics such as attractive in appearance, being the desirable substitute products of other class water pipes, also will be the final selection of potable water feedwater piping.The size of pipe and tubing that present domestic welding type connects is mainly according to two standards of GB/T12771, CJ/T151.Be respectively Ningbo Hua Tao company and Shenzhen folk music company.The SOCKET WELDING pipe fitting of Ningbo Hua Tao company design, it is the joint socket that turning is processed into, mode with welding is fixed on the stainless steel pipe of thin-walled, or the Stainless Steel Tube that directly adopts heavy wall is made pipe fitting and turning joint socket, adopt the SOCKET WELDING pipe fitting to connect construction, have cost low, save installing space, welding procedure is simple and obvious superiority such as join strength height, anti-pulling, vibration resistance.But the joint socket of heavy caliber pipe fitting needs to process with the thicker seamless stainless steel pipe turning of tube wall, and small-bore pipe fitting need be made and the turning joint socket of the seamed pipe of heavy wall, exists material consumption big, defectives such as processing cost height.The SOCKET WELDING pipe fitting that Shenzhen folk music company produces, be with standard C J/T151 tubing as pipe, directly with the thin-wall pipe shaping pipe fitting, it is simple to have embodied processing technology from project organization, no dead meal has been saved material greatly, has reduced manufacture cost.Pipe insertion pipe fitting with corresponding specification during use puts in place, pipe and pipe fitting port form a right angle face, then face place, pipe fitting port right angle is welded, pipe and pipe fitting are welded together, but because tube wall is thinner, in the welding process, welding part tube wall penetration dross, both hindered the flow velocity of water, and easily made Stainless Steel Tube produce intergranular corrosion again.

The model utility content

The purpose of this utility model is that the existing thin-walled stainless steel tube SOCKET WELDING installation of solution pipe fitting production materials are many, and the cost height is easy to generate defectives such as dross in the tube wall during welding procedure.Also we can say the advantage of having drawn above-mentioned pipe fitting, and improved, keep away the two shortcoming, collect a kind of GB thin-walled stainless steel tube socket joint argon tungsten-arc welding joint construction of the two advantage and one.

The technological scheme that the utility model adopted is: a kind of GB thin-walled stainless steel tube socket joint argon tungsten-arc welding joint construction, it is characterized in that: pipeline and the mutual socket joint of connection pipe fitting that needs connect, the pipeline insertion depth is to limited step, use tungsten argon arc welding gun alignment tube end melting welding step then, its width is respectively DN15-DN50 type 1.0mm, DN60-DN100 type 2.0mm, wall thickness is type DN15-DN50 type 0.4mm respectively, DN60-DN100 type 0.8mm, between the control tungsten argon arc welding current 10A-20A, the high temperature that utilizes electric current to discharge melts the melting welding step, and pipeline and pipe fitting welding are linked together.

Described connection pipe fitting is the pipe joint of straight-through or elbow or threeway or four-way or isometrical or reducer.

With GB GB/T19228.2 thin-wall stainless steel is pipe, and little caliber need not thick pipe, and big caliber need not thickness and is connected, and directly utilizes pipe reaming moulding, and materials are few, can reduce the pipe fitting manufacture cost; Can exchange with GB stainless steel clamp-press type pipe simultaneously, especially at the incompetent high temperature of clamp-press type pipeline, macroseism pipeline section, as the boiler room pipeline section, connect air compressor pipeline section etc., with GB GB/T19228.2 thin-wall stainless steel is the pipe fitting that pipe is made, and compares the pipe fitting of same inside nominal diameter with the GB/T12771 standard with CJ/T151, it is big to have caliber, the characteristics of water flowing superior performance.See attached list with the tubing parameter comparison of pipe fitting coupling.

Subordinate list is the contrast table that existing SOCKET WELDING standard and the utility model use standard.

Existing SOCKET WELDING standard and the utility model use the contrast table unit of standard: mm

The beneficial effects of the utility model: owing to adopt pipeline socket joint argon tungsten-arc welding joint construction, the welding part is attractive in appearance, firm, inner tube wall can not produce defectives such as penetration dross, leaving width in pipe fitting joint socket end is 1.0-2.0mm, wall thickness is the melting welding step of 0.4-0.8mm, when the pipe socket joint behind pipe fitting, adopt the melting welding step of argon tungsten-arc welding (TIG) heat fusion welded fitting, the melting welding step is as scolder, rapid clinkering pipe under the high temperature of argon tungsten-arc welding, the right angle face of having avoided direct heat fusion welded fitting and pipe to form, and because of the wall thickness of pipe not enough, produce the flow velocity that inner tube wall penetration dross had both hindered water, easily make Stainless Steel Tube produce the defective of intergranular corrosion again.The utility model can be used for the potable water water supply piping system widely.

Description of drawings

Fig. 1 is the utility model SOCKET WELDING pipe fitting connection diagram;

Fig. 2 is that the utility model needs socket welded pipe elbow schematic representation;

Fig. 3 is that the utility model needs socket welded pipe fitting reducer schematic representation;

Fig. 4 is that the utility model needs socket welded pipe fitting threeway schematic representation.

Label in the accompanying drawing: 1. pipeline, 2. pipe fitting, 3. limited step, 4. melting welding step, 5. elbow, 6. reducer.

Embodiment

Be further described below in conjunction with the embodiment of Figure of description a kind of GB thin-walled stainless steel tube socket joint argon tungsten-arc welding joint construction of the present utility model.

As shown in Figure 1, a kind of GB thin-walled stainless steel tube socket joint argon tungsten-arc welding joint construction of the present utility model, pipeline 1 and connection pipe fitting 2 mutual socket joints by the needs connection, the pipe insertion depth is to limited step 3, use tungsten argon arc welding gun alignment tube end melting welding step 4 then, its width is respectively DN15-DN50 type 1.0mm, DN60-DN100 type 2.0mm, wall thickness is respectively DN15-DN50 type 0.4mm, DN60-DN100 type 0.8mm.Between the control tungsten argon arc welding current 10A-20A, the high temperature that utilizes electric current to discharge melts the melting welding step, and pipeline and pipe fitting welding are linked together, and connection pipe fitting 2 shown in Figure 1 is threeway.

As shown in Figure 2, connection pipe fitting is an elbow 5.

As shown in Figure 3, connection pipe fitting is a reducer 6.

As shown in Figure 4, connection pipe fitting 2 is threeway.

More than an embodiment of the present utility model is had been described in detail, but described content only is preferred embodiment of the present utility model, can not be considered to be used to limit practical range of the present utility model.All equalizations of doing according to the utility model application range change and improve etc., all should still belong within the patent covering scope of the present utility model.

Claims

1. GB thin-walled stainless steel tube socket joint argon tungsten-arc welding joint construction, it is characterized in that: pipeline (1) that needs connect and the mutual socket joint of connection pipe fitting (2), the pipe insertion depth is to limited step (3), use tungsten argon arc welding gun alignment tube end melting welding step (4) then, its width is respectively DN15-DN50 type 1.0mm, and DN60-DN100 type 2.0mm, wall thickness are respectively DN15-DN50 type 0.4mm, DN60-DN100 type 0.8mm links together pipeline and pipe fitting welding.

2. GB thin-walled stainless steel tube socket joint argon tungsten-arc welding joint construction according to claim 1 is characterized in that: described connection pipe fitting (2) is straight-through or elbow (5) or threeway or four-way or pipe joint isometrical or reducer (6).