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Dear all, May I know the fastest and safest way to depressurize a steam boiler? Thanks and regards Hisham Hashim 012-4090054

Dear all, May I know what is the typical stress value used in designing steam boiler? Thanks very much Aida

Dear all I have been searching high and low for this procedure: "Action to take when steam boiler overpressures due to fail safety valves". If you gentlemen have such procedure and willing to share it here, it would be much appreciated. Thanks and have a nice day. Best regards Aida Hannah

Hi, I just want to update. I heard the design code BS 2790 firetube boiler was replaced with BS EN12953. How about the design code BS 1113 for watertube boiler, any replacement? Thanks Aida

Dear all First of all, I lack knowledge of LEL and UEL. What I know, below LEL, or 100%LEL (5% by volume), methane is too little to burn, so a flame cannot happen. And above UEL% (15% by volume), the mixture is too rich to burn or explode. At what concentration of methane does burner support...

Dear all I need your gentlemen's advice on this. In the event of heavy rupture of a tube in a water tube boiler, do you need to continue pumping the water as to maintain the water level in the drum, or do you stop once you noticed the tube rupture? Thanks Aida

Dear Mr. pmover Thanks for your response. The boiler is a water tube boiler, 40 t/h, with 35 bar of pressure. The boiler uses transparent gauge glasses. The question raised was in the event of no interface in the gauge glass, and the gauge glass could be full or could be empty, would you...

Dear all I was assigned by my superior to do an emergency shutdown procedure in the event of water not visible in the level gauge glass of a boiler. Water not visible could be the glass is full or empty, so, if anybody has the experience doing such an emergency procedure, could you please...

Dear all I need your advice because I have so many versions of answers. What is the rate of increment in pressure per minute for the hydrostatic test? People are saying that the increment must be gradual to prevent shock, some say 5 bar per minute, others said 10 bar per minute (wow pretty...

Mr gerharld Thanks for your input. Yes, probably the sealing is in series, meaning if one gland leaks, the valve still has the other seal, you know, like that below valves. Have you any picture of this valve? I googled and cannot find one.

Dear mk3223 I thought that's the one, but maybe there's other design that fits the criteria of double gland.

Dear all, I need your help. I have googled for hours but cannot find this type of valve: "double gland" type. Probably it is known by different name, but if anyone knows how does this valve look like, please help. Thanks very much Aida

Dear Mr Dhurjati Yes there are downcomers at the water wall headers but no downcomers below the mud drum.

Mr. Metengr The boilermaker is "Vickers Hoskins", it's a local Malaysian company. Many people suspect those tubes originated from heated downcomers.

Dear all, I need your help. There are several curved tubes which are located in the water drum (mud drum) of a boiler. I don’t have the drawing, I only have the picture. If someone over here have worked with this type of boiler, could you please tell me the functions of those curved tubes? The...

Dear all I would like to know, what is the maximum thickness of a carbon steel plate, for instance ASTM A516, can be cold rolled? Is there any code we can refer to? What is the limit of thickness a plate can be hot rolled? Thanks very much Ms Aida

Dear all, I have a confusion over this one issue - type of furnace cooling during emergency shutdown under low water condition. When the water level is not visible in the gage glass, emergency shutdown of the boiler must be carried out, such as cutting off the burner, shut off feed pump, and...

Dear all, May I know what is the function of the bull-nose tubes in the high-pressure boilers? Thanks Aida

Dear all, May I know: 1) For internally-fired fire tube boilers such as the Scotch Marine or package type, where is the location of the fusible plug? 2) For water tube boilers, where is the location of the fusible plug? Thanks for your help. Aida

Hi all, I was told by a friend that: 1) Only seamless tube is allowed for superheaters, regardless of temperature. According to him, all types of welded tubes are not allowed for superheaters. I know carbon steel ERW SA178 is used for medium and low-pressure boiler, but I also noticed some...