WENZHOU HUASHANG STEEL CO., LTD. CALL US ANYTIME
+86-577-86383608
WENZHOU HUASHANG STEEL CO., LTD. EMAIL US NOW
info@sstubecn.com
WENZHOU HUASHANG STEEL CO., LTD.
WENZHOU HUASHANG STEEL CO., LTD.
inner banner

Failure and Prevention of Stainless Steel Boiler Tube

The importance of stainless steel boiler tube


The types of stainless steel boiler tube failure include overheat burst tube, wear failure, corrosion failure, welding leakage, and misused steel. The failure characteristics and causes are analyzed, and the corresponding preventive measures are put forward.


Relative to mechanical equipment, stainless steel boiler tube has no movement machinery that severe problem such as wear and tear, vibration, high fatigue, but because of its working conditions, by the quality of soda, operating conditions, such as flue gas flow conditions, the influence of explosive leakage accident more, prevent boiler tube leakage, stainless steel, therefore, it has become the key to improve the safe and economic operation of power plant.


The types of stainless steel boiler tube failure are: overheat burst tube, wear failure, corrosion failure, thermal fatigue failure, welding leakage, wrong steel, etc.


Failure and prevention of stainless steel boiler tube


1. Pipe detonation due to overheat


1) Long-term overheat tube detonation


Failure reason: The stainless steel boiler tube is in overtemperature state operation for a long time, long-term overtemperature may be due to boiler overload, poor soda circulation, combustion center deviation, tube inner wall scaling, etc.


Preventive measures: Stabilize operating conditions, monitor operating temperature, adjust and improve combustion conditions, perform boiler pickling, remove inner wall scaling, etc.


2) Short-term overheat tube explosion


Failure reasons: Foreign matter blocking stainless steel tube, boiler combustion instability, low steam flow rate or steam stratification, temperature regulation is not correct, scale.


Preventive measures: Remove foreign bodies, stabilize operating conditions, and improve combustion conditions in the furnace.


2. Wear and tear


Failure reason: poor coal quality, hard particles in fly ash, scour the surface of stainless steel tube.


Preventive measures: Select the appropriate type of coal, rationally design the economizer structure, eliminate the excessive local smoke speed, add the equal-flow baffle, and add the anti-wear cover plate on the surface of the stainless steel tube.


3. Corrosion


Failure reason: a) The passivation film on the inner wall of the pipe is broken, and electrochemical corrosion occurs at the rupture point. b) The stress concentration at the elbow promotes pitting. c) The elbow is subjected to thermal impact, which causes fatigue cracks to occur on the inner wall of the elbow. d) There is water in the pipe when the furnace is shut down.


Preventive measures: Strengthen the protection of stainless steel boiler tube before use, keep the water quality qualified, strictly control the PH value and oxygen content, and pay attention to stop the furnace protection.

Related News

  • Keep The Surface Of Stainless Steel Hex Tubing Clean!

    Keep The Surface Of Stainless Steel Hex Tubing Clean!

    March 22, 20191. Summary of Stainless Steel Hexagonal TubesStainless steel hexagonal pipe is a solid long strip of stainless steel with hexagonal cross section. Because of the characteristics of stainless steel hex...view
  • Attention in the Production Process of Medical Grade Capillary

    Attention in the Production Process of Medical Grade Capillary

    April 21, 2020Medical grade capillary production process should pay attention to the five main points:1. Whether the annealing temperature can reach the regular temperature. Stainless steel thermal treatment is gen...view
  • The Introduction of  Stainless Steel Capillary Tube

    The Introduction of Stainless Steel Capillary Tube

    March 22, 2019The Introduction of 304 stainless steel capillary tube=304In recent years, stainless steel capillary tube has been mentioned a lot, in fact, it is a tool widely used in the electronic product producti...view
  • Introduction And Classification of Stainless Steel Tubes

    Introduction And Classification of Stainless Steel Tubes

    April 21, 2020Stainless steel round tube is a hollow strip of round steel, which is widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial conveying pipel...view
  • Stainless Steel Reducer Pipe

    Stainless Steel Reducer Pipe

    May 27, 2019Stainless Steel Reducer Pipe features in strong and convenientconnection, good sealing effect. Stainless steel pipe has been widely used in the market because of its good characteristics since its app...view
  • Stainless Steel Pipe Vs PVC Pipe

    Stainless Steel Pipe Vs PVC Pipe

    November 12, 2019Originally Thought that PVC Water Pipe Material is the Best, And The Result Shows Stainless Steel Pipe Is Better! It Features Rust free and Corrosion Resistance.Take Japan and Germany for example. In ...view

More Tubing Fittings To Consider

  • Medical Tubing

    Medical Tubing

    July 10, 2018Medical stainless steel tube available as seamless thin wall tubes, welded redrawn condition, seamless thick wall tubes.view
  • Weld Neck Flanges

    Weld Neck Flanges

    July 10, 2018Stainless steel neck flanges are popularly used in excessive stress applications.view
  • Lap Joint Flanges

    Lap Joint Flanges

    July 10, 2018ASME/ANSI B16.5; 1/2"-24" ; 150LB, 300LB, 600LB, 900LB; 1/2"-12";1500LB; 2500LB.view
WENZHOU HUASHANG STEEL CO., LTD.