Stress Relieving Heat Treatment for Stainless Steel Tanks
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For stainless steel pressure vessel storage tanks that store highly toxic media, after the entire equipment is welded, should the overall stress relief heat treatment be performed and how to do it?
don't want. Read the manufacturing inspection chapter of GB150
Used, GB150 medium 10.4.1.1 f) Unless otherwise specified in the drawing, the welded joints of austenitic stainless steel do not need to be heat treated. This clause corresponds to the thickness of the steel. according to 10.4.1.3 The drawing indicates that for containers containing extremely or highly hazardous media, the equipment should be heat treated.
No heat treatment is required for contacting stainless steel pressure vessels.
No, stainless steel has excellent toughness and almost no residual stress.
If a carbon steel container holds highly toxic media, heat treatment is required. Stainless steel material is not required
Post-weld heat treatment of austenitic stainless steel can reduce residual stress and reduce stress corrosion cracking susceptibility. However, improper post-weld heat treatment can aggravate intergranular corrosion or σ phase precipitation and cause embrittlement. It is not clear whether post-weld heat treatment affects the safe performance of austenitic high-alloy steel. So GB150 regulations: Unless otherwise specified in the drawing, the welded joints of austenitic stainless steel do not need to be heat treated.
Article 74 of the "Capacity Law" generally does not require heat treatment after welding of austenitic stainless steel or non-ferrous metal pressure vessels. If there are special requirements that require heat treatment, it should be noted on the drawing.
GB150 "Steel Pressure Vessel" 10.4.1.3 The drawing indicates that containers containing extremely or highly hazardous media should undergo post-weld heat treatment. Therefore, for post-weld heat treatment, the method to be adopted depends on the specific conditions of your vessel, and then refer to the following regulations. Article 73 Post-weld heat treatment of steel pressure vessels should meet the following requirements: 1． High-pressure vessels, medium-pressure reaction vessels and storage vessels, horizontal storage tanks containing mixed liquefied petroleum gas, and mobile pressure vessels should adopt integral heat treatment in the furnace. Other pressure vessels should adopt overall heat treatment. Large pressure vessels can be processed in sections. The length of the overlapping heat treatment part should not be less than 1500mm, and the heat preservation measures should be adopted for the outer part of the furnace. This post was last edited by gzk1986 on 2009-2-25 10:24 ]
Stainless steel containers do not need to undergo stress relief heat treatment, mainly because of concerns about sensitization effects
According to GB150 regulations 10.4.1.3 The strip drawing indicates that containers containing extremely or highly toxic media should undergo post-weld heat treatment. but 10.4.1.3 Unless otherwise specified in the drawing, the welded joints of austenitic stainless steel do not need to be heat treated. Article 74 of the "Capacity Law" generally does not require heat treatment after welding of austenitic stainless steel or non-ferrous metal pressure vessels. If there are special requirements that require heat treatment, it should be noted on the drawing. So no heat treatment is required.
I have never heard that stainless steel needs to be heat treated. . .
Stainless steel equipment usually does not undergo heat treatment. If it must be done, the heat treatment temperature should not be lower than 800 degrees, preferably solid solution treatment.
Stainless steel is generally not subjected to stress relief treatment after welding to avoid sensitization of the stainless steel and affect corrosion resistance.
What this brother said is accurate. Stainless steel generally does not undergo heat treatment. It is solid solution treated under special conditions.