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2. Bonded seal - Wikipedia

   en.wikipedia.org/wiki/Bonded_seal

   Originally made by Dowty Group, they are also known as Dowty seals or Dowty washers. [1] Now widely manufactured, they are available in a range of standard sizes and materials [2] [3] [4] A bonded seal consists of an outer annular ring of a hard material, typically steel, and an inner annular ring of an elastomeric material that acts as a ...

3. List of DIN standards - Wikipedia

   en.wikipedia.org/wiki/List_of_DIN_standards

   DIN 18800-4: Steel structures – Part 4: Analysis of safety against buckling of shells: Withdrawn: DIN EN 1993: DIN 18800-5: Steel structures – Part 5: Composite structures of steel and concrete – Design and construction: Withdrawn: DIN EN 1994: DIN 18800-7: Steel structures – Part 7: Execution and constructor's qualification: Active: EN ...

4. Drain-waste-vent system - Wikipedia

   en.wikipedia.org/wiki/Drain-waste-vent_system

   All DWV systems require various sized fittings and pipes which are measured by their internal diameter of both the pipes and the fittings which, and in most cases are Schedule 40 PVC wye's, tee's, elbows ranging from 90 degrees to 22.5 degrees for both inside diameter fitment (street) as well as outer diameter fitment (hub), repair and slip ...

5. ASTM A53 steel - Wikipedia

   en.wikipedia.org/wiki/ASTM_A53_steel

   4.4 When pipe is cold expanded, the amount of expansion shall not exceed one and one-half percent (1-1⁄2%) of the specified outside diameter of the pipe. [4] APPLICATIONS ASTM A53 pipeline is planned for mechanical as well as pressure applications and is also appropriate for ordinary usages in vapor, water, gas and also air lines. [5]

6. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   Threaded steel pipe is widely used in buildings to convey natural gas or propane fuel and is also a popular choice in fire sprinkler systems due to its resistance to mechanical damage and high heat (including the threaded joints). Threaded steel pipe may still be used in high-security or exposed locations because it is more resistant to ...

7. Washer (hardware) - Wikipedia

   en.wikipedia.org/wiki/Washer_(hardware)

   The American National Standards Institute (ANSI) provides standards for general use flat washers. Type A is a series of steel washers at broad tolerances, where precision is not critical. Type B is a series of flat washers with tighter tolerances where outside diameters are categorized as "narrow", "regular" or "wide" for specific bolt sizes. [26]