2023 Washington Code 70.79.240 – Inspection of boilers, unfired pressure vessels — Scope — Frequency

2022 Washington Code 70.79.240 – Inspection of boilers, unfired pressure vessels–Scope–Frequency

2020 Washington Code 70.79.240 – Inspection of boilers, unfired pressure vessels — Scope — Frequency

2019 Washington Code 70.79.240

2018 Washington Code 70.79.240 – Inspection of boilers, unfired pressure vessels — Scope — Frequency

2016 Washington Code 70.79.240 – Inspection of boilers, unfired pressure vessels–Scope–Frequency

2015 Washington Code 70.79.240 – Inspection of boilers, unfired pressure vessels–Scope–Frequency

2014 Washington Code 70.79.240 – Inspection of boilers, unfired pressure vessels — Scope — Frequency

2013 Washington Code 70.79.240 – Inspection of boilers, unfired pressure vessels — Scope — Frequency

2009 Washington Code 70.79.240 – Inspection of boilers, unfired pressure vessels — Scope — Frequency