ASSY:KNEE JOINT;PULVERIZED COAL PIPES

0615097 ASSY:KNEE JOINT;PULVERIZED COAL PIPES (Eskom Matimba Spec)

ASSEMBLY:

• TYPE: KNEE JOINT;
• APPLICATION: PULVERIZED COAL PIPES;
• DIMENSIONS: ID 610 X OD 729 MM;
• MATERIAL: CR HIGH CAST;
• SPECIFICATION: 22%-28% BS4844;
• COMPRISING: ITEM 1 MALE; ITEM 2 FEMALE; ITEM 3 RING; ITEM 4 BOLTS M14 X
  75; ITEM 5 WASHER M14; ITEM 6 PLUG M10; ITEM 7 SEAL 10 X 10 INCONEL INSERTED
  FLEXIBLE GRAPHITE/GRAPHITE FINISH;
• DRAWING NO: 20.58/56003 REV 0

Knee Joint Assemblies designed for pulverized coal pipes, as required for industrial applications, likely within power generation or heavy industrial sectors such as mining or cement production. The assemblies are critical components ensuring the integrity and efficiency of pulverized coal transport systems, which are essential for fuel delivery in coal-fired power plants or similar facilities. The assemblies must meet stringent material, dimensional, and performance standards to withstand the abrasive and high-temperature conditions of pulverized coal transport.

Item Details

• Part Number: 0615097

• Quantity: 6 each

• Assembly Type: Knee Joint

• Application: Pulverized Coal Pipes

• Drawing Reference: 20.58/56003, Revision 0

Technical Specifications

The Knee Joint Assembly is designed to connect sections of pulverized coal pipes, providing a robust and flexible joint capable of accommodating thermal expansion, vibration, and abrasive wear. The assembly must comply with the following specifications:

Dimensions

• Inner Diameter (ID): 610 mm

• Outer Diameter (OD): 729 mm

• Tolerance: As per BS4844 standard, ensuring precise fit and compatibility with existing piping systems.

Material

• Primary Material: Chromium (Cr) High Cast

• Chromium Content: 22%–28%, as specified by BS4844, to ensure high resistance to abrasion, corrosion, and thermal stress caused by pulverized coal flow.

• Additional Components:

  • Seal Material: Inconel-inserted flexible graphite with graphite finish, sized 10 x 10 mm, for high-temperature sealing and durability.

  • Bolts and Washers: High-strength steel, corrosion-resistant, suitable for industrial environments.

  • Plug: Designed for secure sealing, compatible with high-pressure systems.

Components

The Knee Joint Assembly comprises the following items, each critical to the assembly’s functionality:

1. Item 1: Male Component

   • Forms the protruding section of the joint, designed to fit securely into the female component.

   • Precision-machined to ensure alignment and a tight seal.

2. Item 2: Female Component

   • Receives the male component, providing a secure connection point.

   • Engineered to accommodate thermal expansion and mechanical stress.

3. Item 3: Ring

   • Reinforces the joint, ensuring structural integrity under operational pressures.

   • Likely serves as a retaining or alignment ring for the male and female components.

4. Item 4: Bolts (M14 x 75)

   • Quantity: As required per assembly (not specified, assumed standard quantity for joint size).

   • M14 diameter, 75 mm length, high-strength, suitable for securing the joint under high vibration and pressure.

5. Item 5: Washer (M14)

   • Paired with M14 bolts to distribute load and prevent damage to the joint surface.

   • Corrosion-resistant to maintain integrity in harsh environments.

6. Item 6: Plug (M10)

   • M10 plug for sealing auxiliary ports or inspection points, ensuring no leakage of pulverized coal or gases.

   • Designed for easy installation and removal during maintenance.

7. Item 7: Seal (10 x 10 mm, Inconel-Inserted Flexible Graphite/Graphite Finish)

   • Provides a high-temperature, high-pressure seal between joint components.

   • Inconel insertion enhances durability against thermal cycling and abrasive coal particles.

   • Graphite finish ensures smooth installation and long-term sealing performance.

Standards and Compliance

• Material Specification: BS4844 (British Standard for cast iron and steel castings), ensuring compliance with 22%–28% chromium content for high-cast components.

• Manufacturing Standards: Components must adhere to the tolerances and quality requirements outlined in Drawing No. 20.58/56003, Revision 0.

• Quality Assurance: Each assembly must undergo rigorous inspection for dimensional accuracy, material composition, and structural integrity prior to delivery.

• Testing Requirements:

  • Pressure testing to confirm leak-proof performance under operational conditions.

  • Abrasion resistance testing to verify suitability for pulverized coal transport.

  • Thermal cycling tests to ensure seal and material stability at high temperatures.