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2. Sleeve (construction) - Wikipedia

   en.wikipedia.org/wiki/Sleeve_(construction)

   For example, a 4" pipe, with 1" of thermal insulation makes a 6" penetrant (1" pipe covering on each side of the pipe), plus two pipe sizes = an 8" sleeve, creating a 1" annulus. In case of insulated piping, the size of the insulation must be taken into account for the intended firestop certification listing .

3. Bollard - Wikipedia

   en.wikipedia.org/wiki/Bollard

   In the maritime contexts in which the term originates, a bollard is either a wooden or iron post found as a deck-fitting on a ship or boat, and used to secure ropes for towing, mooring and other purposes; or its counterpart on land, a short wooden, iron, or stone post on a quayside to which craft can be moored.

4. Heat-shrinkable sleeve - Wikipedia

   en.wikipedia.org/wiki/Heat-shrinkable_sleeve

   The first heat-shrinkable sleeves were introduced [when?] as polyethylene pipeline coatings started to replace bituminous or tape coatings in the oil and gas industry. At the time, the processing for polyethylene to make the sleeve backing was new technology and the adhesives used in sleeves were much the same as those used on pipeline coating.

5. Sleeve valve (water) - Wikipedia

   en.wikipedia.org/wiki/Sleeve_valve_(water)

   Additionally, unlike conventional control valves the sleeve valve increases flow incrementally, i.e. 10% increase in stroke leads to a 10% increase in flow. Sleeve valves are adaptive to system or consumer requirements. The sleeve valve is designed to meet the requirements and allow for a wide range of variability of function.

6. Hollow structural section - Wikipedia

   en.wikipedia.org/wiki/Hollow_structural_section

   Circular HSS are sometimes mistakenly called steel pipe, although true steel pipe is actually dimensioned and classed differently from HSS. (HSS dimensions are based on exterior dimensions of the profile; pipes are also manufactured to an exterior tolerance, albeit to a different standard.)

7. Municipal castings - Wikipedia

   en.wikipedia.org/wiki/Municipal_castings

   The Municipal Castings Association is an organization made up of the following American manufacturers: Charlotte Pipe and Foundry Company, D&L Foundry and Supply, US Foundry, EBAA Iron, EJ, McWane, Neenah Foundry, and Spring City. [3] Municipal castings also have to follow the country-of-origin marking requirement laws.