Seared glass was not working on my server so I was lucky to find these lines on a server startup:

[Server thread/INFO] [TSteelworks]: Registered deep tank glass type Glass with capacity of 20000mB
[Server thread/INFO] [TSteelworks]: Registered deep tank glass type White Stained Glass with capacity of 20000mB
[Server thread/INFO] [TSteelworks]: Registered deep tank glass type Thickened Glass with capacity of 25000mB
[Server thread/INFO] [TSteelworks]: Registered deep tank glass type Edged Glass with capacity of 25000mB
[Server thread/INFO] [TSteelworks]: Registered deep tank glass type Glass Bricks with capacity of 25000mB
[Server thread/INFO] [TSteelworks]: Registered deep tank glass type Carved Glass with capacity of 35000mB
[Server thread/INFO] [TSteelworks]: Registered deep tank glass type Golden Edged Glass with capacity of 60000mB
[Server thread/INFO] [TSteelworks]: Registered deep tank glass type Obsidian Glass with capacity of 50000mB
[Server thread/INFO] [TSteelworks]: Registered deep tank glass type Swirling Glass with capacity of 25000mB
[Server thread/INFO] [TSteelworks]: Registered deep tank glass type Glowstone Glass with capacity of 60000mB
[Server thread/INFO] [TSteelworks]: Registered deep tank glass type Heart Glass with capacity of 30000mB
[Server thread/INFO] [TSteelworks]: Registered deep tank glass type Square Glass with capacity of 25000mB
[Server thread/INFO] [TSteelworks]: Registered deep tank glass type Dark Glass with capacity of 50000mB

[Server thread/WARN] [TSteelworks]: Failled to register deep tank glass type Seared Glass: Block has a tile entity
[Server thread/WARN] [TSteelworks]: Failled to register deep tank glass type Seared Glass: Block has a tile entity

[Server thread/INFO] [TSteelworks]: Registered deep tank glass type Clear Glass with capacity of 25000mB
[Server thread/INFO] [TSteelworks]: Registered deep tank glass type White Stained Glass with capacity of 25000mB

Intended because they're tile entities, I know I should change the image in the Steelworking and you book