EJMA Three Way Corrugated Power Plant Expansion Joints Flexible For Boiler Room Pipe

DINKONDA GLOBAL Power Plants Special Three-way Corrugated Metal Compensator Metal Expansion Joints For Boiler Room Coal Powder Pipelines

Product Introduction:
The new type of three-way corrugated expansion joint for coal powder pipelines is a specialized metal compensation device developed specifically for coal powder gas-solid two-phase flow pipelines in thermal power plants. It replaces old-fashioned packing sleeve compensators and solves problems such as powder leakage, jamming, and powder accumulation wear in old-fashioned products

Main Structural Components:
1. Guide pipe (wear-resistant inner cylinder): made of wear-resistant carbon steel with the same wall thickness as the pipeline, with a smooth inner wall, resistant to coal powder erosion and wear, and no powder accumulation;
2. Stainless steel corrugated pipe: multi-layer hydraulic forming, commonly made of 1Cr18Ni9Ti (321) material, to achieve three-dimensional displacement compensation;
3. Refractory fiber insulation layer: Fill the gap between the corrugated pipe and the guide tube to prevent coal powder from entering the valley;
4. Flexible graphite secondary sealing component with skeleton: core leak proof powder structure;
5. The middle connecting pipe, end connecting pipe, and limit rod components are all welded without flanges (coal powder pipelines are generally butt welded).

Core Features:
1. Three directional composite compensation: can simultaneously absorb axial, lateral (arbitrary radial), and a small amount of angular combined thermal displacement;
2. No powder leakage or accumulation: guide tube+graphite secondary seal, eliminating the hidden danger of coal powder leakage;
3. Low stiffness, good flexibility, and low load on pipeline supports and hangers;
4. High temperature resistance and resistance to coal powder erosion and wear; Fatigue life ≥ 1000 full displacement cycles.
5. Low maintenance requirements, with a service life 2-3 times that of old-fashioned sleeve compensators.

Purpose:
1. Mainly used for the primary air powder supply pipeline, secondary air, and tertiary air pipeline of thermal power boilers, installed in the horizontal/vertical section of the burner inlet, absorbing the three-dimensional composite displacement caused by the downward expansion of the furnace and the thermal expansion and contraction of the pipeline, releasing the thermal stress of the pipeline, avoiding weld cracking, equipment damage under stress, preventing coal powder leakage, and ensuring the safe operation of the boiler.
2. It can also be used for other gas-solid two-phase transportation pipelines containing dust particles in the metallurgical and petrochemical industries.

Applicable Working Conditions:
Medium: hot air+coal powder (gas-solid two-phase), medium flow rate: 15-30m/s
Design pressure: PN ≤ 0.25MPa (maximum 0.5MPa)
Design temperature: ≤ 450 ℃, normal operation 60-420 ℃
Nominal diameter: DN200~DN600 (mainstream specification for coal powder pipelines in power plants)
Connection method: Pipeline butt welding

Two Typical Installation Methods:
1. Horizontal layout
Mainly absorbs lateral displacement, with a small amount of axial displacement attached; Cold tightening (offset installation) is required on site, with the cold tightening amount taken as 50% -100% of the downward expansion of the burner.
2. Vertical layout
Mainly absorbing axial displacement, with a small amount of lateral displacement attached; Pre stretching at the factory reduces the stress on the equipment interface.

Technical Specifications:

FAQ:
Q1.What about the lead time?
A: 5-7 days for Sample preparing ,15-20 working days for mass production.

Q2. Is it OK to print my logo on led light product?
A: Yes. Please inform us formally before our production.

Q3: Do you offer guarantee for the products?
A: Yes, we offer 1 years warranty to our products.

Q4: How to deal with the faulty?
A: Firstly, Our products are produced in strict quality control system and the defective rate will be less than 0.2%.

Secondly, during the guarantee period, we will send new lights with new order for small quantity. For defective batch products, we will repair them and resend them to you or we can discuss the solution including re-call according to real situation.

Company Profile

DINKONDA GLOBAL has been developing and supplying equipment and components for specialized thermal power plants and related industries for 20 years and is one of the a market-leading global manufacturers and providers in the industry. We have a professional technical research and development team, professional management talents and dozens of quality inspection personnel. The company has more than 50 CNC machining centers, CNC lathes, various inspection equipment and other professional equipments.
Our comprehensive product portfolio and over 20 years of industry knowledge mean customers can rely on us to deliver innovative, reliable and economic products. Chenglei products are designed and manufactured with quality components and clear user interfaces for quick and safe operation in the field. Our strict product development and testing ensures long-lasting performance and continued reliability. Our independently developed and produced CL series valve electric actuators are widely used in various industries such as Oil & Gas, Water & Power, and Chemical, Process & Industrial .
Customers rely on us for innovative, high quality and dependable products for managing the flow of liquids, gases and powders. We help customers around the world to reduce emissions, improve efficiency, minimize their environmental impact and assure safety.