CN104625287A - Copper pipe braze welding technology - Google Patents

Abstract

The invention discloses a copper pipe braze welding technology. The process of the technology comprises the steps of cleaning, pipe inserting, preheating, soldering flux heating, welding and testing. The copper pipe braze welding technology has the advantages of being simple and convenient to operate, easy to control, short in construction cycle, and high in production efficiency.

Description

Copper pipe soldering processes

 

Technical field

The invention belongs to soldering processes, be specifically related to a kind of copper pipe soldering processes.

 

Background technology

Pipe fitting has red copper and brass two kinds, and for red copper pipe fitting, when adding thermal weld, flame should be partial to pipe fitting, because pipe wall is thicker; For brass pipe fitting, when adding thermal weld, flame should be partial to copper tube, because brass fusing point is lower.Current copper pipe soldering processes are complicated, and great in constructing amount, cost is high.

 

Summary of the invention

In order to overcome the above-mentioned defect that prior art field exists, the object of the invention is to, a kind of copper pipe soldering processes are provided, simple to operation.

Copper pipe soldering processes provided by the invention, technological process comprises:

The impurity such as a, the rubbish removing tubing interface and pipe fitting socket with rubber, earth and oxide, and wipe clear with clean hard waste;

B, by pipe inserting pipe elements, after fully inserting, half-twist;

C, with welding torch by flame furnishing neutral flame, copper pipe socket to above 150mm place carry out local preheating, in pipe fitting bottom Ye Zuo local preheating, during heating, constantly flame is moved up and down, and circle, pipe and pipe fitting are heated evenly, are heated to 400 DEG C-500 DEG C;

D, 101# silver brazing agent is dropped into the weld seam mouth of socket joint junction, make silver brazing agent melted by heating become liquid, under capillary action, solder flux fully sucks in circumferential weld;

E, low silver solder welding torch to be heated, and be coated with 101# silver soldering agent, be heated to 650 DEG C of-700 DEG C of meltings, the solder of melting under capillary action, flows and is inhaled into inner wall of circumferential seam, until solder is full in circumferential weld, in this process, progressively weaken heating, until stop;

F, when progressively cooled and solidified is complete solid state to solder, now temperature drops to 400 DEG C-500 DEG C, checks weld seam whether defectiveness, as defectiveness, takes advantage of interface temperature higher, carry out repairings and weld;

G, fully to solidify at solder, but when cooling not yet completely, clean with hard waste, clear water the solder flux stayed around weld bond, then dry with dry hard waste;

H, to be dried after, with varnish at weld bond district varnish coating once;

Whether i, inspection connect straight, as straight not, then and straightening.

Copper pipe soldering processes provided by the invention, its beneficial effect is, simple to operation, is convenient to control, and short construction period, production efficiency is high.

 

Detailed description of the invention

Below in conjunction with an embodiment, copper pipe soldering processes provided by the invention are described in detail.

 

Embodiment

The impurity such as a, the rubbish removing tubing interface and pipe fitting socket with rubber, earth and oxide, and wipe clear with clean hard waste;

B, by pipe inserting pipe elements, after fully inserting, half-twist;

C, with welding torch by flame furnishing neutral flame, copper pipe socket to above 150mm place carry out local preheating, in pipe fitting bottom Ye Zuo local preheating, during heating, constantly flame is moved up and down, and circle, pipe and pipe fitting are heated evenly, are heated to 400 DEG C-500 DEG C;

D, 101# silver brazing agent is dropped into the weld seam mouth of socket joint junction, make silver brazing agent melted by heating become liquid, under capillary action, solder flux fully sucks in circumferential weld;

E, low silver solder welding torch to be heated, and be coated with 101# silver soldering agent, be heated to 650 DEG C of-700 DEG C of meltings, the solder of melting under capillary action, flows and is inhaled into inner wall of circumferential seam, until solder is full in circumferential weld, in this process, progressively weaken heating, until stop;

F, when progressively cooled and solidified is complete solid state to solder, now temperature drops to 400 DEG C-500 DEG C, checks weld seam whether defectiveness, as defectiveness, takes advantage of interface temperature higher, carry out repairings and weld;

G, fully to solidify at solder, but when cooling not yet completely, clean with hard waste, clear water the solder flux stayed around weld bond, then dry with dry hard waste;

H, to be dried after, with varnish at weld bond district varnish coating once;

Whether i, inspection connect straight, as straight not, then and straightening.

Claims (1)

1. copper pipe soldering processes, is characterized in that, technological process comprises:

The impurity such as a, the rubbish removing tubing interface and pipe fitting socket with rubber, earth and oxide, and wipe clear with clean hard waste;

B, by pipe inserting pipe elements, after fully inserting, half-twist;

C, with welding torch by flame furnishing neutral flame, copper pipe socket to above 150mm place carry out local preheating, in pipe fitting bottom Ye Zuo local preheating, during heating, constantly flame is moved up and down, and circle, pipe and pipe fitting are heated evenly, are heated to 400 DEG C-500 DEG C;

D, 101# silver brazing agent is dropped into the weld seam mouth of socket joint junction, make silver brazing agent melted by heating become liquid, under capillary action, solder flux fully sucks in circumferential weld;

E, low silver solder welding torch to be heated, and be coated with 101# silver soldering agent, be heated to 650 DEG C of-700 DEG C of meltings, the solder of melting under capillary action, flows and is inhaled into inner wall of circumferential seam, until solder is full in circumferential weld, in this process, progressively weaken heating, until stop;

F, when progressively cooled and solidified is complete solid state to solder, now temperature drops to 400 DEG C-500 DEG C, checks weld seam whether defectiveness, as defectiveness, takes advantage of interface temperature higher, carry out repairings and weld;

G, fully to solidify at solder, but when cooling not yet completely, clean with hard waste, clear water the solder flux stayed around weld bond, then dry with dry hard waste;

H, to be dried after, with varnish at weld bond district varnish coating once;

Whether i, inspection connect straight, as straight not, then and straightening.