---
title: Tier 3 Emissions Standards Are Coming, Are You Ready?
description: Lower sulfur emissions will require inert coatings for effective sulfur sampling.
---

[SilcoTek Coating Blog ](https://www.silcotek.com/blog)

# [Tier 3 Emissions Standards Are Coming, Are You Ready?](https://www.silcotek.com/blog/tier-3-emissions-standards)

 Written by [Marty Higgins](https://www.silcotek.com/blog/author/marty-higgins) | July 30 2014

The US Environmental Protection Agency is finalizing new passenger car and truck emissions regulations.  Starting in 2017 through 2025, Tier 3 will set new passenger car and truck emission standards and lowers sulfur content in fuel.  Under the proposed regulation, gasoline sulfur content will be reduced from 30ppm to 10ppm.  [Read the Proposed Tier 3 Standard.](https://www.silcotek.com/hs-fs/file-1344329373-pdf/docs/EPA_Tier_3_Emission_Standards.pdf)   The rule will significantly reduce overall vehicle emissions:

Refinery operations may need to upgrade sulfur sample systems to improve sulfur analysis, inertness and sensitivity in order to comply with new Tier 3 regulations.  As target sulfur content decreases, the practices and systems used to monitor low level sulfur become more problematic.  Sample methods like priming, or short duration/high flow rate exposure to stainless steel surfaces previously successful at 30ppm may not yield effective results at 10ppm. 

Components in refinery sampling susceptible to sulfur adsorption are:

- Probes
- Tubing
- Metal filters
- Sample Cylinders
- Regulators
- Fittings
- Valves

### SilcoNert® 2000.  The most effective surface for low level sulfur inert sampling and transfer.

[SilcoNert® 2000](https://www.silcotek.com/silcod-technologies/SilcoNert-inert-coating) is an inert coating that virtually eliminates surface adsorption of active chemicals.  SilcoNert 2000 prevents:

- Lost or degraded[ sulfur test results](https://www.silcotek.com/sulfur-trace-level-analysis-refinery-whitepaper) in sample systems.
- [False readings](https://www.silcotek.com/sulfur-analysis-do-dont-polyolefin-whitepaper)
- Slow [calibration](https://www.silcotek.com/sulfur-enhance-analytical-sensitivity-reliability-whitepaper) response
- Failure to identify [sulfur contamination](https://www.silcotek.com/sulfur-trace-h2s-analysis-standards-whitepaper) in product streams

[View full post](https://www.silcotek.com/blog/tier-3-emissions-standards)

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