three return cast iron solid fuel boiler

Fang fast open class formal lecture: products, services both hands April 18, Fang fast open class smooth commencement, partners from across the country converge in the exchange of learning party headquarters R & D building fast training room, professional trainers to share a three return cast iron solid fuel boiler features, installation and operation precautions, commissioning maintenance process, rapid fault verification, and troubleshooting tips, and other professional knowledge, students listen carefully, positive answer questions, and the atmosphere is very active.

Select mild steel, gas-fired materials: manual arc welding. The average tensile strength of ordinary low-carbon steel Q235 417.5MPa. According to the principle of equal strength, should E43 series matching electrode. Several different selected electrodes SMAW steels shown in Table 1. Table 1 dynamic load-type electrode low carbon steel, slab structure complicated, manual arc welding three return cast iron solid fuel boiler and pressure vessel of choice for soldering electrode type Q235 {+ * /} E4313, E4303, E4301, E4320, E4311 {+ * / } E4316, E4315 (E5016, E5015) is generally not preheated Q255 {+ * /} is generally not preheated Q275 {+ * /} E4316, E4315E5016, E5015 {+ * /} structural slab preheating temperature higher than 150 ℃ C {+ * /} 08,10,15,20 {+ * /} E4303, E4301, E4320, E4311 {+ * /} E4316, E4315 (E5016, E5015) 25 {+ * /} E4316, E4315E5016, E5015 {+ * /} structural slab preheating temperature exceeds 150 ℃ 20g, 22g {+ * /} E4303, E4301E4316, E4315 (E5016, E5015) * + slab structure {/} preheated 100≤150 ℃ {+ * /} 20RE4303 , E4301 {+ * /} E4316, E4315 (E5016, E5015) is generally not preheated

Winterized gas hot water three return cast iron solid fuel boiler heating system can handle a lot of heating units use gas hot water boilers for heating residential or office area in the winter. Taking into account the particular winter weather, the boiler room will do a lot of heat treatment, to prevent the cracking occurs due to the cold boiler at runtime. But this is not enough, gas hot water boiler itself also have to make antifreeze treatment. First, a user should choose a suitable antifreeze as the case of the gas hot water boiler plumbing system. Many gas hot water boilers and plumbing systems used aluminum alloy material may be selected silicate antifreeze; however, the system for cast iron, it is necessary to add corrosion inhibitors, PH value is adjusted to between 8-9. Also note that you want to purchase by the state designated testing station tested and antifreeze products, if the use of substandard antifreeze heating system will corrode if the gas hot water boiler plumbing system had not using antifreeze, then added flush the plumbing system before antifreeze. Question about the freezing point of antifreeze, to use different freezing point of antifreeze antifreeze use according to the temperature regions. Antifreeze freezing point should be lower than the historical low temperature in the region of 5-10 ℃; can not mix different brands of antifreeze, so as not to damage their overall corrosion resistance. When the gas hot water boiler running for some time, antifreeze will be appropriate to reduce some of this time to check the density of antifreeze. If the boiler does not increase the density of antifreeze, which may be caused due to the leakage, should be added to antifreeze the same model; if the density drops, most likely due to water evaporation caused, at this time should be added distilled or deionized water .

After the three return cast iron solid fuel boiler stop working, turn off the boiler inlet and outlet valves, open the drain valve to discharge water. Fill nitrogen with a purity of 99% or more to the tubes. When filling nitrogen, close all the external interfaces of boiler water side, and should be tight without leakage, nitrogen pressure gauge should be kept at more than 0.05MPa. During the nitrogen protection, should always observe boiler water system nitrogen pressure, when it drops, you should find and eliminate the leaks and add nitrogen to keep the required pressure. During the nitrogen protection if could fill nitrogen timely, and keep the required pressure, This method is applicable to long-term shutdown (over three months), or prevent boiler from freezing and icing in cold climates. When restart the boiler, the nitrogen could exhaust to the air directly.

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