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  2. Standard dimension ratio - Wikipedia

    en.wikipedia.org/wiki/Standard_dimension_ratio

    Standard dimension ratio (SDR) is a method of rating a pipe's durability against pressure. The standard dimension ratio describes the correlation between the pipe dimension and the thickness of the pipe wall. [1] Common nominations are SDR11, SDR17, SDR26 and SDR35. Pipes with a lower SDR can withstand higher pressures.

  3. Panzergewinde - Wikipedia

    en.wikipedia.org/wiki/Panzergewinde

    An assortment of PG cable glands.Similar glands with DIN/ISO metric threads are also available. The Stahlpanzerrohrgewinde (German: [ˈʃtaːlˌpantsɐʁoːɐ̯.ɡəˌvɪndə], "steel conduit thread") standard for screw threads, more often called by the shortened Panzergewinde (German: [ˈpantsɐɡəˌvɪndə]), was a technical standard created in Germany and subsequently used in Switzerland ...

  4. Ductile iron pipe - Wikipedia

    en.wikipedia.org/wiki/Ductile_iron_pipe

    In the late 1950s, ductile iron pipe was introduced to the marketplace, featuring higher strength and similar corrosion resistance compared to cast iron. [10] According to a 2004 study, an expected lifespan of 100 years is likely for ductile iron pipe, based on test results, field inspections and in-service operations over 50 years. [11]

  5. American National Standards Institute - Wikipedia

    en.wikipedia.org/wiki/American_National...

    The ANSI annual operating budget is funded by the sale of publications, membership dues and fees, accreditation services, fee-based programs, and international standards programs. Many ANSI regulations are incorporated by reference into United States federal statutes (i.e. by OSHA regulations referring to individual ANSI specifications).

  6. Economy of China - Wikipedia

    en.wikipedia.org/wiki/Economy_of_China

    The economy of the People's Republic of China is a developing mixed socialist market economy, incorporating industrial policies and strategic five-year plans. [29] China is the world's second largest economy by nominal GDP and since 2017 has been the world's largest economy when measured by purchasing power parity (PPP).

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