Commonly used export standard stainless steel pipe sizes deviation table

standard	OD tolerance				wall thickness tolerance
	size	deviation			size		deviation
GB5310-1995	≤30	±0.20		±0.15	2~3		+12%-10%		±10%
	>30~50	±0.30		±0.25
	>50	±0.80%		±0.60%	>3		±10%		±7.5%
GB/T14976-02	6~10	±0.20		±0.15	≤3		±14%		+12.5%-10%
	>10~30	±0.30		±0.20
	>30~50	±0.40		±0.30	>3		+12.5%-10%		±10%
	>50	±0.90%		±0.80%
GB9948-88	≤30	±0.20			≤3		+12%-10%
	>30~50	±0.30
	>50	±0.80%			>3		±10%
GB13296-91	8~30	±0.20			1.0~3.0		+12%-10%
	>30~50	±0.30
	>50	±0.80%			>3		±10%
ASMESA213SA415	<25.4	0.1	-0.1		≤38.1		20%		0
	25.4~38.1	0.15	-0.15
	>38.1~<50.8	0.2	-0.2
	50.8~<63.5	0.25	-0.25
	63.5~<76.2	0.3	-0.3		>38.1		22%		0
	76.2~<101.6	0.38	-0.38
	>101.6~190.5	0.38	-0.64
	>190.5~228.6	0.38	-1.14