In high pressure boiler seamless steel tube:

Execution standard: GB5310-2008
Material: 20G, 12Cr1MoVG, 15CrMoG

20G:

Execution standard: GB5310-2008 GangHao: ф 10-20G specification: ф 30 * 3-50

12Cr1MoVG:

Execution standard: GB5310-2008 GangHao: 12Cr1MoVG specification: ф 10 - ф 108 x 2-13mm

15CrMoG:

Execution standard: GB 5310-2008 GangHao: 15CrMoG specification: ф 8 - ф 1,240 x 1-200mm