pipe used in bridge construction project

JIS G3444 is the Japanese Industrial Standard for carbon steel pipes for general structural use.

Slip-on pipe flanges actually slip over the pipe.  These pipe flanges are typically machined with an inside diameter of the pipe flange slightly larger than the outside diameter of the pipe.

ASTM A213 is a standard specification for seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes.

SS330 and SS490 are two types of carbon structural steel in Japanese steel standards, which are usually used to manufacture pipes and structural members. "Long seam submerged arc welded carbon pipe" refers to carbon steel pipes produced using the straight seam submerged arc welding process.