Compare material and liner options

Why “Abrasion-Resistant Pipe” and “Flange Material” Are Different Decisions

Searches for abrasion-resistant pipe usually focus on pipe wall loss, replaceable liners or wear-resistant tube products. A flange joint adds other requirements: pressure boundary integrity, bolt loading, conta oturma yeri, karşı karşıya kalma durumu, weldability and dimensional compatibility. The pipe, liner and flange can therefore use different materials when the design documents and joining method permit it.

Malzeme, Liner and Coating Options

A Five-Step Selection Method

1. Define the wear mechanism

Record the solids, particle shape and size, konsantrasyon, akış hızı, angle of impact and whether wear is sliding, impact-dominated or erosion-corrosion. A material that performs well in low-angle sliding abrasion may not be suitable for repeated impact.

2. Separate corrosion loss from mechanical wear

Klorürler, asitler, alkalis and temperature can remove protective films and accelerate erosion-corrosion. Duplex stainless steels can be useful when particle wear and corrosion occur together; nickel alloys are selected primarily for demanding corrosion or temperature conditions, not simply because particles are present.

3. Locate the wear zone

Confirm whether material loss is in the straight pipe, elbow, liner termination, flange bore, gasket seating area or downstream turbulence zone. Protecting the pipe bore while leaving an abrupt liner step at the flange can move the wear problem rather than solve it.

4. Keep the flange specification complete

Specify NPS/DN, basınç sınıfı veya PN, flanş tipi, karşı karşıya, delik veya boru programı, malzeme özellikleri, corrosion allowance and any liner/coating. The pressure-temperature rating and bolting/gasket design must be checked as a complete joint.

5. Define acceptance evidence

Request the MTC for the pressure-boundary material and separate records for coating or liner type, thickness or application procedure when applicable. Add dimensional, visual and NDE requirements that match the purchase specification rather than relying on a generic “abrasion resistant” label.

Published Product Pages for Material Review

These links lead to actual SASAFLANGE product pages. They are starting points for a quotation review, not proof that a grade is suitable for every abrasive service.

Yaygın Spesifikasyon Hataları

• Calling for “abrasion-resistant steel” without naming the flange standard or pressure class.
• Assuming pipe and flange must use the same wear material.
• Ignoring the liner termination, gasket seating width or bolt-load effect.
• Using hardness alone as a wear-life guarantee.
• Combining dissimilar metals without reviewing galvanic corrosion and electrical isolation.
• Requesting a coating without stating its permitted area, preparation, inspection and repair method.

SSS

Is abrasion-resistant steel pipe automatically compatible with standard flanges?

HAYIR. The pipe or liner may be optimized for wear while the flange must satisfy a separate pressure-boundary and dimensional standard. The transition and joining details need engineering review.

Are duplex flanges always more wear resistant than carbon steel flanges?

Not in every wear mode. Duplex grades can be advantageous in erosion-corrosion because they combine corrosion resistance, strength and useful surface hardness, but particle impact, velocity and joint geometry still control service performance.

Should a coating cover the gasket seating surface?

Only when the approved joint design and coating procedure explicitly allow it. Coating thickness, compressibility, adhesion and surface finish can affect gasket seating and bolt load.

Technical Basis

• ASTM A532/A532M — abrasion-resistant cast irons and their intended wear applications.
• Outokumpu Forta duplex datasheet — corrosion, strength and erosion-corrosion context.
• Özel Metaller INCONEL alaşımı 625 bülten — corrosion and high-temperature properties.
• SSAB wear-steel product program — pipe, tube and wear-liner context.