美国采购需求：中国LSAW/SSAW钢管和焊接管

I'm looking to receive pricing for a few specific pipe orders. First, I require 20 pieces of spiral welded carbon steel pipes, each with a diameter of 4 inches and a length of 12 meters. Additionally, I'm interested in 40 pieces of pipes featuring a 6-inch diameter, also measuring 12 meters in length. Lastly, I'm requesting a quote for 20 more pieces of 8-inch diameter spiral welded carbon steel pipes, again at 12 meters long. These pipes will be vital for an upcoming project, so I would appreciate a detailed breakdown of your pricing, including any potential discounts for bulk orders. It would also be helpful to know about your lead times and shipping options. Looking forward to your prompt response so we can finalize this order swiftly.