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Recommended materials for pipelines in refinery catalytic cracking units

2025-09-14View Original

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The riser shell is made of carbon steel with a heat-insulating and wear-resistant lining. The cold wall shell of the reaction oil and gas pipeline is also made of carbon steel with a heat-insulating and wear-resistant lining, while the hot wall shell is made of 15CrMo. The shells of the raw catalyst pipeline and the regenerated catalyst pipeline are made of carbon steel with a heat-insulating and wear-resistant lining, 0Cr17Ni12Mo2. Bellows expansion joints FN2, B315, or Incoloy800. The flue gas pipeline features a carbon steel cold wall casing with an insulating and wear-resistant lining; the temperature of the hot wall casing is ≤650°C, 0Cr18Ni9 ; Hot wall shell temperature > 650°C, 0Cr17Ni12Mo2. Bellows expansion joints FN2, B315, or Incoloy800.

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