Tianjin's 7 foundry companies receive funding from the United Nations
Welding Neck Flanges are easy to recognize at the long tapered hub, that goes gradually over to the wall thickness from a pipe or fitting.
The long tapered hub provides an important reinforcement for use in several applications involving high pressure, sub-zero and / or elevated temperatures. The smooth transition from flange thickness to pipe or fitting wall thickness effected by the taper is extremely beneficial, under conditions of repeated bending, caused by line expansion or other variable forces.
These flanges are bored to match the inside diameter of the mating pipe or fitting so there will be no restriction of product flow. This prevents turbulence at the joint and reduces erosion. They also provide excellent stress distribution through the tapered hub and are easily radiographed for flaw detection.
This flange type will be welded to a pipe or fitting with a single full penetration, V weld (Buttweld).
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It is understood that under the support of the Global Environment Facility, the Chinese Ministry of Agriculture, the United Nations Development Program, and the United Nations Industrial Development Organization jointly organized and implemented the "China Township Enterprise Energy Conservation and Greenhouse Gas Emission Reduction Project." Seven industrial enterprises with casting operations in Jinnan District are included in the “China Township Enterprise Energy Saving and Greenhouse Gas Emission Reduction Project†plan. Seven companies received 10,000 US dollars of project support funds and 50,000 yuan of energy-saving technological reform funds granted by the district government. The technical transformation of energy-saving and emission reduction achieved remarkable results. Seven companies achieved annual savings of more than 850 tons of standard coal, more than 2,100 tons of carbon dioxide emission reductions, and the average energy conservation rate of enterprises was 16.7%. The rate of rejects before and after technical changes decreased by 3.4%.