哥伦比亚采购需求：各种材质无缝钢管、各种规格精密轧管、法兰、法兰毛坯、板材、卷材

I'm looking to source some RTJ gaskets that meet industry standards for use with high-pressure flanges. The specifications should align with typical requirements for heavy-duty applications. Please let me know about the available options. Could you also provide details regarding lead times, pricing, and any minimum order quantities? Additionally, if there are any relevant certifications or quality assurance processes in place, I'd appreciate that info as well. Thanks!