QB/T 2072.2-1994 Sugar-making machinery, general parts for pressure vessels, steel flat-welding flange (without projections)

QB/T 2072.1-1994 Sugar-making machinery, common parts for pressure vessels, steel flat-welding flange QB/T 2072.3-1994 Sugar-making machinery, general parts for pressure vessels, and welded austenitic stainless steel pipes for heat exchangers QB/T 2072.4-1994 Sugar-making machinery, general parts for pressure vessels, steel hanging supports QB/T 2072.5-1994 Sugar-making machinery, common parts for pressure vessels, and non-bevelled conical head QB/T 2072.6-1994 Sugar-making machinery, general components for pressure vessels, rectangular manhole QB/T 2072.7-1994 Sugar-making machinery, general components for pressure vessels, and sight glass QB/T 2072.8-1994 Sugar-making machinery, common parts for pressure vessels, sight glass cover QB/T 2072.9-1994 Sugar-making machinery, common parts for pressure vessels, and steam three-way valve QB/T 2072.10-1994 Sugar-making machinery, common parts for pressure vessels, flat welding flange gasket