When selecting a Pall ring for a distillation or absorption tower, most engineers look at diameter, surface area, and pressure drop. But one parameter is often overlooked until it's too late: molybdenum content in SS316L.

What does molybdenum do?

Molybdenum (Mo) improves the resistance of stainless steel to pitting corrosion, especially in environments containing chlorides or acids. In SS316L, the ASTM A240 standard requires Mo content between 2.0% and 2.5%.

However, not all suppliers meet this standard. Some use lower-grade material with Mo below 2.0%, which significantly reduces the service life of the packing in corrosive services.

What Pingxiang Daier does differently

At Pingxiang Daier Separation Tech, every batch of SS316L Pall ring is manufactured with Mo content ≥ 2.0%, verified by material test reports. We do not assume compliance. We document it.

Beyond material compliance, we provide:

Ruler-measured actual photos per batch (no CGI renders)

ISO 9001:2015 certified manufacturing

Factory-direct supply from Pingxiang, China

Where SS316L Pall rings are used

Typical applications include:

Crude oil distillation units

Sour water strippers

Amine absorption towers

Acid gas treatment systems

Final thought

A Pall ring is a simple product. But the difference between 2.0% Mo and 1.8% Mo can mean years of service life in a corrosive tower. That difference starts with supplier selection.

For project-specific recommendations, contact our engineering desk with your operating conditions.

Pingxiang Daier Separation Tech Co., Ltd.WhatsApp: +86 13960136381 | Email: nina@pxdaier.com | Web: pxdaier.com