Manufacturer Sells Cast Iron Furnace Doors Manhole Doors Square Bow Shaped Circular Furnace Doors Inspection Doors Positive Pressure Furnace Doors for Boiler

• Customization: Available
• Certification: CE, ISO
• Customized: Customized
• Model NO.: LM-ZT LM-GG LM-BX LM-TC LM-NM LM-TL LM-GC LM-QZ
• Surface Treatment: Natural
• Fuel: Oil, Coal, Gas
• Range of Applications: Power station, Life, Industrial
• Type: Boiler Door
• Payment Method: Tt LC
• Price Terms: EXW Fob CFR CIF DDP
• Material: Cast Iron,Cast Steel,Mild Steelcarbon Steel
• Standard: Ht150
• Transport Package: Wooden Box, Iron Box, Customized
• Specification: 300*400 400*400 400*500 500*600 500*500 600*800
• Trademark: JG
• Origin: China
• HS Code: 8402900000
• Production Capacity: 50000tons/Year

Product Description

Product Introduction
         The boiler door is an important component of the boiler combustion system, mainly used for sealing, observing, and maintaining the combustion chamber. Its design and selection directly affect the safety, thermal efficiency, and operational convenience of the boiler.
Product parameters

product name	Boiler door
material	Heat-resistant Steel,Cast Iron,Cast Steel,Mild steel,Carbon Steel,Alloy Steel, etc.
Material standards	ASME,SAE,NF EN,DIN EN,ISO,BS EN,etc
port	Qingdao Port, Tianjin Port, Guangdong Port.
delivery time	7~15 days
country of origin	Shandong, China
Specification drawing software	PDF, Auto CAD,Solidworks,JPG, ProE,etc.
Main production equipment	Wax injection, CNc-machine-center, Lathe, Miling machine,Driling machine,Boring Lathe,Grinding Machine, Heattreatment Furnace.
Heat treatment machine	Mesh-Belt-Furnace,Carburizing Quench Furnace,Chamer Furnace,etc.
Surface Treatment	Cold/Hot zn Plating,Blackening Treatment,Ni Plating,cr plating,Spraying Undercoat,Anti. Rust Paint,Surface Paint,Plastic Paint,Coated Anti-Rust Water,Anti-oil,etc.
Surface  Heat Treatment	Medium Frequence Quenching,High Frequence Quenching and Carburizing and Quenching,Oil Quenching,Waterquenching,Normalizing,Temper,Annealing,etc.
Dimensional Inspection	Calipers,Height Laugue,Micrometer Calipers,Inside Caliper Gauge,Angle and R Gauge,four coordinates measuringinstrument.
productivity	50000 tons /year
package	Wooden boxes, iron boxes, and others

Company Profile
               Shandong Jiaguang International is a high-tech enterprise focusing on the research and development, production, sales and service of boiler parts. The company has 30 years of manufacturing experience, as well as modern production base and senior technical team, to ensure to meet the needs of friends from all walks of life for products, and through the ISO9001 international quality system certification, CE certification, SGS origin certification.
The company's main products cover: Active grate, passive grate, grate pin, beam grate, scale grate, reciprocating grate, fixed grate, grate, chain grate, chain rod, scraper accessories, buried scraper chain, boiler hood, boiler tube, steel pipe, square tube, gear and other heat resistant, wear-resistant, corrosion resistant boiler accessories, widely used in electricity, heat, heating, paper mill, printing and dyeing factory, sugar factory, animal farming, Feed mill, chemical industry, etc. Products are exported to Vietnam, Singapore, Thailand, India, India, Pakistan, Tajikistan, Australia, New Zealand, Mexico, Russia, Malaysia, Philippines, South Africa and other more than 30 countries and regions.
It is committed to providing high-quality accessories and solutions for global industrial boilers, power station boilers, civil boilers and other fields, and has become a global benchmark enterprise in the field of boiler accessories.
Product Certification
Product packaging 
1. Principles of Packaging Design
Protection Shock proof and buffering: precision accessories (such as instruments and valves) need to be filled with foam, bubble film, pearl cotton, etc. to avoid damage caused by transportation shock.
Moisture and rust prevention: Metal components (such as pipelines and flanges) need to be coated with rust prevention oil and packaged with moisture-proof film or vacuum. Desiccant should be added during sea transportation.
Anti pressure and anti drop: Heavy accessories (such as burners and drums) are reinforced with wooden boxes or steel frames, indicating the load-bearing direction and stacking layer limits.

2. Standardization and identification
Comply with international transportation standards (such as ISO, ISTA), indicate weight, size, lifting point, "fragile", "moisture-proof", "upward" and other markings.
Dangerous accessories (such as fuel injectors) must be labeled with UN certification and comply with the International Maritime Dangerous Goods Code (IMDG).

3. Container division strategy
Small items (bolts, washers) should be packaged in a uniform size box to avoid loose parts; Large items (heat exchangers) are individually customized in wooden boxes with supporting frames inside.

Product transportation
Transportation mode selection
1. Shipping by sea
Suitable for bulk accessories such as steel plates and large pipelines, pay attention to container size (20GP/40HQ) and load balance.Sea freight requires anti salt spray treatment, with moisture-proof agents placed inside the container and sealed.

2. Land transportation
Heavy accessories (over 3 tons) require flatbed trucks or low chassis vehicles, and routes should be planned in advance to avoid height/weight restrictions.Cross border transportation inspection of various countries' requirements for wooden packaging (such as ISPM15 fumigation certificate).

3. Air freight
Urgent small items (electronic controllers) should be prioritized for air transportation, and the weight of each item should be controlled (usually<100kg) to reduce packaging weight and save costs.

FAQ:
Frequently Asked Questions about Boiler Doors (Q&A)

Q1: How to solve the problem of smoke and air leakage even after the furnace door is closed?
A1:  
Possible reasons:
1. Aging or damage of sealing gasket (failure of graphite/ceramic fiber seal)
2. The door frame is deformed or the hinge is loose
3. There is dust or coking on the contact surface between the furnace door and the door frame
resolvent:
 Replace sealing material: choose high-temperature resistant graphite gasket or metal winding gasket (temperature resistance ≥ 800 ºC).
 Correct door frame: Check the levelness of the door frame and adjust the hinge bolts.
 Clean the contact surface: Remove residual ash after shutdown.

Q2: What should I do if the furnace door window glass often breaks?
A2:  
Cause analysis:
The temperature resistance of glass is insufficient (ordinary glass has a limit of about 300 ºC).
Thermal shock rupture (alternating cold and hot impacts).
Smoke corrosion (high sulfur fuel corrodes glass).
Improvement plan:
Upgrade glass material: Replace with tempered borosilicate glass (temperature resistant to 800 ºC) or mica glass (temperature resistant to 500 ºC).
Install protective layer: Install an openable and closable metal baffle on the outside of the glass to reduce direct thermal radiation.

Q3: Can the edge of the cast iron furnace door crack and continue to be used?
A3:  
Risk assessment:
Small crack (<5mm): Can be used temporarily, but requires close observation.
Large or penetrating cracks: must be replaced immediately, otherwise it may crack and injure people!
Temporary fix:
Fill with high-temperature metal repair agent (temperature resistant to 600 ºC) for emergency purposes only.
Fundamental solution:
Replace with cast steel or stainless steel furnace doors (such as LM-GG series) to improve thermal shock resistance.

Q4: Difficulty in opening and closing the furnace door, how to lubricate it?
A4:  
Lubrication steps:
1. Remove the accumulated dust on the hinges and tracks.
2. Apply high-temperature lubricating grease (such as molybdenum disulfide grease, with a temperature resistance of ≥ 300 ºC).
3. Check if the hinge is deformed and replace it if necessary.
Preventive measures:
Lubricate at least once a month, and switch to dry film lubricants in high-temperature areas.

Q5: How to deal with the misoperation (frequent opening) of explosion-proof doors?
A5:  
Cause investigation:
The set value of the bursting disc pressure is too low (such as lower than the normal furnace pressure).
The spring mechanism is stuck or corroded.
Solution:
Adjust pressure setting: recalibrate according to the boiler design pressure (usually 0.05~0.1MPa).
Cleaning and maintenance: Disassemble the spring mechanism, remove rust and lubricate.
Contact our professional engineering team promptly when encountering any questions!