To ensure the flange gasket provides a tight seal,
Better Scheduling for Repairs
Please send us photos of the old gaskets and flanges, along with their dimensions and operating conditions, so we can work together to confirm the material, sealing surfaces, and installation requirements, and finalize the specifications for the next steps.
Material Selection · Dimension Confirmation · Flange Face Matching · Installation Requirements
If you're looking for flange gaskets,
Have you encountered any of the following issues?
I just replaced the gasket—why is the joint leaking again?
Given that the size and material are the same, why is the service life shorter this time?
The specifications all seem correct, so why doesn't it seal properly after I lock it?
Materials, flange faces, and on-site conditions,
We need to confirm this together to make sure it's accurate.
Chengxin has evolved from simply supplying materials to integrating materials, parts, and engineering requirements. By first examining the medium, temperature, and pressure, and then verifying the gasket geometry, flange surfaces, and bolting conditions, the company systematically narrows down the causes of recurring leaks.
If you already have old parts, drawings, or part numbers, start with the existing information; also make a clear list of what information needs to be added.
6 Major Advantages of Chengxin Flange Gaskets
Each step of verification is designed to ensure that the materials, specifications, and equipment operating conditions are consistent with one another.
Identifying the Cause of Recurring Leaks
Based on signs of wear on the old parts—such as cracks, misalignment, extrusion, and erosion—and by comparing them with the materials, sealing surfaces, and installation conditions, we will identify the next steps for improvement.
Select materials based on operating conditions for greater reliability
Confirm the name of the medium along with its concentration, temperature, pressure, and cleaning conditions to narrow down the list of suitable material candidates.
Dimensional Alignment for Smoother Assembly
Verify the inner diameter, outer diameter, thickness, and hole locations; for special shapes, confirm based on existing parts or drawings, and compile the specifications required for quoting and machining.
Flange-to-flange mating ensures a more complete seal
Determine the gasket configuration by identifying the type of sealing surface—whether flat, convex, or other—and considering the condition of the contact surfaces.
Clearly state the installation requirements to make scheduling maintenance easier.
Include cleaning, centering, and fastening procedures, as well as equipment specifications, in the verification process to provide a reference for replacement operations.
Drawings and Material Specifications Make Acceptance Clearer
Verify the dimensions, materials, and documentation requirements as needed, and organize the information required for prototyping, testing, and subsequent supply in advance.
First, check the gasket type,
Next, select materials based on operating conditions
Even if the external dimensions are the same, different materials may be required; first confirm the flange face and dimensions, then consider the medium, temperature, and pressure.
Ring-shaped/Flat Gaskets
Determine the overall shape based on the sealing surface area, bolt hole locations, and equipment specifications.
Special Sizes / Custom Gaskets
If the standard dimensions do not fit, start by checking the old parts, measurements, or 2D drawings.
Materials and Composite Structures
Based on operating conditions, identify potential materials such as PTFE, rubber, fiber, graphite, or metal composites.
Organize all the product selection information at once
Media and Operating Conditions
Media Name/Concentration, Normal and Maximum Temperatures, Pressure, Start/Stop or Cleaning Cycles.
Flange Faces and Dimensions
Photos or equipment drawings showing the flange type, inner and outer diameters, thickness, hole locations, and sealing surfaces.
Delivery and Verification Requirements
Quantity, intended use, sample testing methods, and any required materials or compliance documents.
PTFE-Type Gaskets
First, confirm the medium and cleaning conditions, then verify the formulation, thickness, and flange face fit.
Rubber Gaskets
Determine the type of seal, the mating dimensions, and replacement requirements based on the medium, temperature, and compression conditions.
Fiber, Graphite, and Metal Composites
Confirm the design based on equipment specifications, temperature and pressure settings, and fastening conditions; compile the prototype and supply specifications.
The image shows a schematic representation of the material and shape; material suitability and temperature/pressure ratings are determined based on the specific grade, gasket structure, and equipment conditions. Please provide the operating conditions so we can narrow down the available specifications.
First, assess the site, then determine the appropriate sealing method.
Pipes/Valves | Leaks at Joints
First, check the medium, pressure, and the alignment of the flange faces and gaskets; then, review the materials and fastening conditions.
Equipment Integration | Changes in Operating Conditions
When process, temperature, or cleaning conditions change, re-verify the specifications of the original gasket and the suitability of the material.
Old Evidence Is Invalid | Leave Clues for Judgment
Take clear photographs of any cracks, extrusions, erosion, or eccentricities, and provide them along with the disassembly locations and operating conditions.
The materials and dimensions are based on specific criteria,
Better Delivery, Better Acceptance
Confirm the materials, documentation, dimensions, and appearance based on requirements. If you need a comparison of incoming materials or compliance documentation, first compile a list of the items to be verified, and then confirm what information can be provided.
Material Comparison
Verify material grades, perform FTIR comparisons, and review available material documentation as needed.
Document and Specification Review
Organize dimensions, appearance, and documentation items according to the confirmed specifications, and coordinate sample delivery and acceptance.
Check the drawings against the actual items
The dimensions, hole locations, and thickness of the old parts, along with the drawing version, shall serve as the common basis for machining and acceptance.
Confirm the installation and testing conditions together
Verify the fastening and testing procedures in accordance with the original manufacturer’s specifications for the equipment or gaskets, and record the actual performance after replacement.
Organize on-site issues into actionable next steps
Recurring Leaks
Compare the leak location, traces of the old part, and operating conditions to determine whether to start by examining the material, dimensions, or joining conditions.
Process Condition Adjustments
When the medium or cleaning method changes, re-align the material orientation and then verify it based on the actual equipment configuration.
Customization and Ongoing Supply
Compile processing specifications from existing parts or drawings, and confirm sample production, testing, and subsequent quantity requirements.
Send me the data,
Go directly to the next step
Old gaskets, photos, dimensions, part numbers, or operating conditions—any of these will work. Please send us the information you have first, and Chengxin will help determine what needs to be replaced. We’ll then narrow down the options, provide a quote, or proceed with a prototype.