Steel Well Casing Pipe Manufactured to Customer Specifications with Focus on Flange Sealing Surface Finish and Bolt Hole Accuracy

 

 

1. Product Overview

Flanged Stainless Steel Pipe refers to stainless steel casing or pipe sections manufactured with custom-designed flanges welded at both ends, forming a ready-to-install connection for piping and casing systems. Each pipe in this batch is produced to the customer's specific requirements, including pipe size, wall thickness, length, flange dimensions and pressure rating, ensuring a precise fit with the existing system. This design eliminates the need for on-site welding, shortens installation time and improves the reliability of the whole pipeline.

 

 

 

2. Key Features

- Twin custom flanges at both ends: ready for direct bolt connection, no field welding required, reducing installation time and labor cost.

- Stainless steel construction: excellent corrosion resistance for water, seawater, chemical and food-grade applications.

- Precision manufacturing: strict control on pipe diameter, wall thickness, flange concentricity and sealing surface finish to guarantee leak-free performance.

- Custom design: flange size, pressure rating, bolt hole pattern, pipe length and material grade are all tailored to the customer's drawing.

- High pressure capability: the flange connection distributes stress evenly and withstands high working pressure and vibration.

 

 

 

3. Materials And Flange Design

The pipe body is made of stainless steel, typically 304, 304L, 316L or Duplex grades, selected according to the working medium and corrosion environment. Flanges are produced in matching material and machined with CNC equipment to ensure flat sealing faces, accurate bolt hole spacing and proper concentricity with the pipe. Depending on the project requirement, flanges can follow ANSI, DIN, JIS or EN standards, with special sizes and non-standard bolt patterns available. Welding between the pipe and flanges is performed by qualified welders with full penetration and smooth finish, followed by pickling and passivation to restore corrosion resistance.

 

 

 

4. Applications

Flanged Stainless Steel Pipe is widely used in water supply and drainage systems, seawater pipelines, chemical processing lines, food and beverage production, pharmaceutical facilities, and oil and gas auxiliary piping. It is also suitable for well casing connections, pump stations, filtration systems and desalination plants where corrosion resistance and quick installation are required.

 

 

 

5. Specifications

 

Specification	Value
Product Type	Flanged Stainless Steel Pipe (Stainless Steel Casing)
Material	Stainless Steel (304 / 304L / 316L / Duplex, Customized)
Pipe Diameter	Customized [e.g. 2 in - 24 in]
Pipe Length	Customized [e.g. 1 m - 12 m]
Flange Type	Customized Both Ends [e.g. ANSI / DIN / JIS / EN]
Flange Pressure Rating	Customized [e.g. PN10 / PN16 / Class 150]
Application	Water, Seawater, Chemical, Food, Oil And Gas Piping

 

 

 

6. Quality Control And Inspection

Every pipe undergoes dimensional inspection, flange concentricity check, sealing face flatness measurement and weld examination before shipment. Hydrostatic pressure testing and material test certificates are available on request, ensuring each flanged pipe meets the agreed specification and is ready for installation without rework.

 

 

 

7. Customization Service And Packaging

As a factory direct manufacturer, we accept OEM orders based on drawings, samples or detailed specifications. Finished pipes are wrapped with protective film or bubble bags, and flange faces are covered with protective caps to prevent scratches during transport; the whole bundle is fixed in a seaworthy package for damage-free delivery.

 

 

 

8. FAQ

 

Q: Can the flanges be made to a specific standard?

A: Yes. Flanges can be produced to ANSI, DIN, JIS, EN or customer-specific drawings with custom pressure ratings and bolt patterns.

 

Q: What stainless steel grades are available?

A: 304, 304L, 316L and Duplex stainless steel are commonly used; the grade is selected according to the working medium and environment.

 

Q: Can non-standard sizes be produced?

A: Yes, customized diameters, lengths, wall thicknesses and flange configurations are all supported for this product.

 

Q: What is the production lead time?

A: It depends on quantity and specifications, and will be confirmed at quotation.

 

 

 

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