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airing it out: fumes from lead-free solders are more harmful than those of tin-lead. what precautions are you taking?
by：Yovog
2023-06-01
Will lead-
Free welding is more harmful than tin to factory employeeslead does?
A study by the Danish Toxicology Center assessed the toxicity of lead and the metals used in leadfree alloys.
Although lead is found to be highly toxic to humans, silver is the standard ingredient for lead
Free alloy, found to be more eco-friendly on several orders of magnitudeToxic than lead(1)
In addition, some other metals used in lead
The results show that the toxicity results of free alloys are uncertain.
So, is switching to lead
Free without increasing employee risk?
In addition, can Environmental practices be implemented without exceeding the budget?
The shortanswer: Yes.
While maintaining financial constraints, employee risk can be reduced.
It is even possible to gain economic benefits. Here\'s how.
Any welding process using pine gum
Resin is produced by base flux.
This substance contains a series of known harmful substances such as carbon monoxide and acetone.
Medical research in the United StatesS.
Resin is linked to occupational asthma by the Occupational Health and Safety Administration and others. (2)
This debilitating breathing condition is irreversible once it appears.
The findings are supported by other studies around the world. Using non-
Pine gum has a greater impact on health.
These fluxes contain alcohol, acids and other chemicals that many alcohols consider harmful to workers and pose a threat to the workplace.
The only safe way to deal with smoke problems is to first prevent smoke from being sucked by using effective smoke extraction to remove contaminated air from the employee\'s work area.
Harmful smoke is generated when volatile substances such as flux, paste, adhesive and cleaning solvent are heated above room temperature. During lead-
The free-process welding temperature is much higher than the traditional tin
Therefore, the impact and potential harm of lead is much greater. [
Figure 1 slightly]
For example, co-crystal tin
Tin lead solder melting around180 [degrees]
C, the welding temperature reaches the peak at about 210degrees]C. Atypical lead-
On the other hand, free welding melts around [degrees]
C. The peak welding temperature is about 250 [degrees]C.
As a result, potentially harmful chemicals and particles are more likely to become air-borne substances with higher concentrations.
Higher processing temperature is not the only reason for lead
Free welding can be more harmful to employees. Lead-
Freealso also needs a more powerful flux activator, which contains chemicals that are allergic and irritating to the skin and eyes.
For successfully formed joints, the concentration of the activator is usually twice the required concentration of tinlead.
Some countries already have legislation banning harmful emissions from welding workers.
In other countries, including the United StatesS.
It is not necessarily illegal, but it does create potential for future responsibility and for the risk of employee absence, Health
Low cost and productivity of care.
Manufacturing assuming lead
Free alloy is safer than tinlead is unwise.
The most sensible step is to use the smoke exhaust equipment directly to solve the problem of harmful smoke. Filter or Vent?
The suction power of some filtration systems is very weak.
In fact, when the suction of the fans fails, their filters may be blocked.
Changing filters too frequently is a common error in the cost of hikesmaintenance.
However, filtration devices are often better than ventilation systems because they are more economical to operate.
Reason: The factory air conditioner with \"air conditioner\" does not need to be replaced.
Smoke is discharged from the welding station using a 10 \"diameter pipe, resulting in a fan on the roof of the factory that can easily carry 1200 cfm (2000[m. sup. 3]/h)
There\'s factory air outside.
\"Make-with cooling or heating-
Air increases energy costs.
There is a filtration device, fume-
The capture nozzle is located near the smoke source, which reduces the total volume of the captured air (Figure 1). Applying high-
Efficient filtration of captured air, allowing it to cycle safely in the plant, immediately reducing manufacturing requirementsup air.
Other benefits of the fume filtration device relative to the ventilation system include: flexibility to rearrange the layout of the production floor without moving the fixed pipe;
No landlord allowed pipe penetration; fast, low-cost setup;
And pipeline maintenance.
In theory, most smoke exhaust systems are similar because they are characterized by the suction of smoke from the breathing area through a filtration system.
However, effective smoke extraction is achieved by adopting multi-level filtration, and the best unit provides three-
Stage method including pre-filter, main (HEPA)
Activated carbon filter. Off-the-
Air purifier--
Types found in the local hardware store--
Give a false sense of security
These devices are usually based on simple carbon filtration, removing visible smoke particles, leaving the impression of a cleaner air.
But they leave smaller invisible particles. -
More dangerous.
A good quality unit should provide at least 99.
The particle removal efficiency of 0 is 5%. 3[micro]m or larger.
Efficient air filters are critical, but be aware that the range of grades covered by many different types of efficient air filters paper can vary by 100 times.
Validity Ratings are only as good as their company qualifications.
Units claimed to be greater than 99.
The efficiency of 9% sounds good.
However, the most harmful components in smoke are also the smallest, which can go deep into the lungs, so the efficiency of capturing micro-particles is really important.
Additional Stage 3 activated carbon filtration is required to respond to harmful, non-particulate gases and steam released during welding, adhesives and solvent heating. [
Figure 2:
However, efficient multi-stage filters become useless without air passing through them.
Therefore, the pump ratio of the unit is an important parameter. A free-
Blow air flow of 75 cfm (125[m. sup. 3]/h)
50 per station-
The exhaust arm of the Mm diameter should be sufficient and look for a suction force of 850 Pa or more.
Other features to be considered in a good smoke exhaust system include the size of the unit and whether it can be located on the bench (Figure 2).
Portability means flexibility;
System that can be set on the floor (Under the bench)
The operator\'s working space will be increased. References 1.
Danish Centre for Environmental Sciences778, 2003. 2. U. S.
Occupational Health and Safety Authority.
\"Occupational asthma \".
Karl Schuepstuhl, Global Product Manager--
Smoke extraction from OKInternational (Okinternational. com);
@ Okinternational. com.
Free welding is more harmful than tin to factory employeeslead does?
A study by the Danish Toxicology Center assessed the toxicity of lead and the metals used in leadfree alloys.
Although lead is found to be highly toxic to humans, silver is the standard ingredient for lead
Free alloy, found to be more eco-friendly on several orders of magnitudeToxic than lead(1)
In addition, some other metals used in lead
The results show that the toxicity results of free alloys are uncertain.
So, is switching to lead
Free without increasing employee risk?
In addition, can Environmental practices be implemented without exceeding the budget?
The shortanswer: Yes.
While maintaining financial constraints, employee risk can be reduced.
It is even possible to gain economic benefits. Here\'s how.
Any welding process using pine gum
Resin is produced by base flux.
This substance contains a series of known harmful substances such as carbon monoxide and acetone.
Medical research in the United StatesS.
Resin is linked to occupational asthma by the Occupational Health and Safety Administration and others. (2)
This debilitating breathing condition is irreversible once it appears.
The findings are supported by other studies around the world. Using non-
Pine gum has a greater impact on health.
These fluxes contain alcohol, acids and other chemicals that many alcohols consider harmful to workers and pose a threat to the workplace.
The only safe way to deal with smoke problems is to first prevent smoke from being sucked by using effective smoke extraction to remove contaminated air from the employee\'s work area.
Harmful smoke is generated when volatile substances such as flux, paste, adhesive and cleaning solvent are heated above room temperature. During lead-
The free-process welding temperature is much higher than the traditional tin
Therefore, the impact and potential harm of lead is much greater. [
Figure 1 slightly]
For example, co-crystal tin
Tin lead solder melting around180 [degrees]
C, the welding temperature reaches the peak at about 210degrees]C. Atypical lead-
On the other hand, free welding melts around [degrees]
C. The peak welding temperature is about 250 [degrees]C.
As a result, potentially harmful chemicals and particles are more likely to become air-borne substances with higher concentrations.
Higher processing temperature is not the only reason for lead
Free welding can be more harmful to employees. Lead-
Freealso also needs a more powerful flux activator, which contains chemicals that are allergic and irritating to the skin and eyes.
For successfully formed joints, the concentration of the activator is usually twice the required concentration of tinlead.
Some countries already have legislation banning harmful emissions from welding workers.
In other countries, including the United StatesS.
It is not necessarily illegal, but it does create potential for future responsibility and for the risk of employee absence, Health
Low cost and productivity of care.
Manufacturing assuming lead
Free alloy is safer than tinlead is unwise.
The most sensible step is to use the smoke exhaust equipment directly to solve the problem of harmful smoke. Filter or Vent?
The suction power of some filtration systems is very weak.
In fact, when the suction of the fans fails, their filters may be blocked.
Changing filters too frequently is a common error in the cost of hikesmaintenance.
However, filtration devices are often better than ventilation systems because they are more economical to operate.
Reason: The factory air conditioner with \"air conditioner\" does not need to be replaced.
Smoke is discharged from the welding station using a 10 \"diameter pipe, resulting in a fan on the roof of the factory that can easily carry 1200 cfm (2000[m. sup. 3]/h)
There\'s factory air outside.
\"Make-with cooling or heating-
Air increases energy costs.
There is a filtration device, fume-
The capture nozzle is located near the smoke source, which reduces the total volume of the captured air (Figure 1). Applying high-
Efficient filtration of captured air, allowing it to cycle safely in the plant, immediately reducing manufacturing requirementsup air.
Other benefits of the fume filtration device relative to the ventilation system include: flexibility to rearrange the layout of the production floor without moving the fixed pipe;
No landlord allowed pipe penetration; fast, low-cost setup;
And pipeline maintenance.
In theory, most smoke exhaust systems are similar because they are characterized by the suction of smoke from the breathing area through a filtration system.
However, effective smoke extraction is achieved by adopting multi-level filtration, and the best unit provides three-
Stage method including pre-filter, main (HEPA)
Activated carbon filter. Off-the-
Air purifier--
Types found in the local hardware store--
Give a false sense of security
These devices are usually based on simple carbon filtration, removing visible smoke particles, leaving the impression of a cleaner air.
But they leave smaller invisible particles. -
More dangerous.
A good quality unit should provide at least 99.
The particle removal efficiency of 0 is 5%. 3[micro]m or larger.
Efficient air filters are critical, but be aware that the range of grades covered by many different types of efficient air filters paper can vary by 100 times.
Validity Ratings are only as good as their company qualifications.
Units claimed to be greater than 99.
The efficiency of 9% sounds good.
However, the most harmful components in smoke are also the smallest, which can go deep into the lungs, so the efficiency of capturing micro-particles is really important.
Additional Stage 3 activated carbon filtration is required to respond to harmful, non-particulate gases and steam released during welding, adhesives and solvent heating. [
Figure 2:
However, efficient multi-stage filters become useless without air passing through them.
Therefore, the pump ratio of the unit is an important parameter. A free-
Blow air flow of 75 cfm (125[m. sup. 3]/h)
50 per station-
The exhaust arm of the Mm diameter should be sufficient and look for a suction force of 850 Pa or more.
Other features to be considered in a good smoke exhaust system include the size of the unit and whether it can be located on the bench (Figure 2).
Portability means flexibility;
System that can be set on the floor (Under the bench)
The operator\'s working space will be increased. References 1.
Danish Centre for Environmental Sciences778, 2003. 2. U. S.
Occupational Health and Safety Authority.
\"Occupational asthma \".
Karl Schuepstuhl, Global Product Manager--
Smoke extraction from OKInternational (Okinternational. com);
@ Okinternational. com.
