低压流体输送用镀锌钢管的尺寸和理论质量(GB/T3091-93) 
| 
				 
					公称直径  | 
			
				 
					外径 
					mm 
  | 
			
				 
					普通钢管  | 
			
				 
					加厚钢管  | 
		|||
| 
				 
					mm  | 
			
				 
					in  | 
			
				 
					壁厚mm  | 
			
				 
					理论质量 kg/m  | 
			
				 
					壁厚mm  | 
			
				 
					理论质量kg/m  | 
		|
| 
				 
					6  | 
			
				 
					1/8  | 
			
				 
					10.0  | 
			
				 
					2.00  | 
			
				 
					0.41  | 
			
				 
					2.50  | 
			
				 
					0.49  | 
		
| 
				 
					8  | 
			
				 
					1/4  | 
			
				 
					13.5  | 
			
				 
					2.25  | 
			
				 
					0.65  | 
			
				 
					2.75  | 
			
				 
					0.76  | 
		
| 
				 
					10  | 
			
				 
					3/8  | 
			
				 
					17.0  | 
			
				 
					2.25  | 
			
				 
					0.87  | 
			
				 
					2.75  | 
			
				 
					1.01  | 
		
| 
				 
					15  | 
			
				 
					1/2  | 
			
				 
					21.3  | 
			
				 
					2.75  | 
			
				 
					1.32  | 
			
				 
					3.25  | 
			
				 
					1.51  | 
		
| 
				 
					20  | 
			
				 
					3/4  | 
			
				 
					26.8  | 
			
				 
					2.75  | 
			
				 
					1.70  | 
			
				 
					3.50  | 
			
				 
					2.09  | 
		
| 
				 
					25  | 
			
				 
					1  | 
			
				 
					33.5  | 
			
				 
					3.25  | 
			
				 
					2.51  | 
			
				 
					4.00  | 
			
				 
					3.00  | 
		
| 
				 
					32  | 
			
				 
					1 1/4  | 
			
				 
					42.3  | 
			
				 
					3.25  | 
			
				 
					3.25  | 
			
				 
					4.00  | 
			
				 
					3.90  | 
		
| 
				 
					40  | 
			
				 
					1 1/2  | 
			
				 
					48.0  | 
			
				 
					3.50  | 
			
				 
					3.98  | 
			
				 
					4.25  | 
			
				 
					4.72  | 
		
| 
				 
					50  | 
			
				 
					2  | 
			
				 
					60.0  | 
			
				 
					3.50  | 
			
				 
					5.06  | 
			
				 
					4.50  | 
			
				 
					6.33  | 
		
| 
				 
					65  | 
			
				 
					2 1/2  | 
			
				 
					75.5  | 
			
				 
					3.75  | 
			
				 
					6.87  | 
			
				 
					4.50  | 
			
				 
					8.10  | 
		
| 
				 
					80  | 
			
				 
					3  | 
			
				 
					88.5  | 
			
				 
					4.00  | 
			
				 
					8.61  | 
			
				 
					4.75  | 
			
				 
					10.07  | 
		
| 
				 
					100  | 
			
				 
					4  | 
			
				 
					114.0  | 
			
				 
					4.00  | 
			
				 
					11.20  | 
			
				 
					5.00  | 
			
				 
					13.79  | 
		
| 
				 
					125  | 
			
				 
					5  | 
			
				 
					140.0  | 
			
				 
					4.00  | 
			
				 
					13.80  | 
			
				 
					5.50  | 
			
				 
					18.66  | 
		
| 
				 
					150  | 
			
				 
					6  | 
			
				 
					165.0  | 
			
				 
					4.50  | 
			
				 
					118.31  | 
			
				 
					5.50  | 
			
				 
					22.13  |