● 船级社规范 Classification of Ships
中国船级社规范	CCS Rules for Classification and Construction of Ships
法国BV船级社规范	BV Rules for Classification of Ships
英国劳氏船级社规范	LR Rules and Regulations for Classification of Ships
挪威船级社规范	DNV Rules for Classification of Ships
美国ABS船级社规范	ABS Rules for Classification of Ships
日本NK船级社规范	NK Rules for Classification of Ships
德国船级社规范	GL Rules for Classification and Construction
● 标准 Standard
GB/T5312-2009
● 用途 Uses
用于船用锅炉、过热器及耐压力系管道的制造
●尺寸偏差  Deviation
外径和壁厚的允许偏差

 

外径 D	热轧管	外径尺寸 mm	≤ 159	＞ 159
		允许偏差 %	± 1.0	± 1.25
	冷拔管	外径尺寸 mm	≤ 30	＞ 30~50	＞ 50
		允许偏差	± 0.20mm	± 0.30mm	± 0.8%
壁厚 S	热轧管	壁厚尺寸 mm	3 ＜ S ≤ 20	S ＞ 20
		允许偏差 %	+15-10	± 10
	冷拔管	壁厚尺寸 mm	1.5~3	＞ 3
		允许偏差 %	+12-10	± 10