This product selects pipe with high quality or pipe assembly with GB/t8163, GB/T3636 and VEXM2340 of VOLVO and then adopts automatic bending process, automatic argon arc welding, automatic surface processing line, powder painting technology of environmental protection and 100% pressure sealing, cleanliness and surface quality of assembly.We choose High quality seamless steel pipe and process by automatic bending, welding and environmentally friendly powder coating technology to create excellent quality.