Tiêu chuẩn DN sang mm

Ống từ ⅛" tới 3½" (từ DN6 - DN90)

Inch	DN	ĐK ngoài (mm)	Độ dày thành ống (mm)
			SCH 5	SCH 10	SCH 30	SCH 40	SCH 80	SCH 120	XXS
⅛	6	10,29 mm	0,889 mm	1,245 mm	1,448 mm	1,727 mm	2,413 mm	---	---
¼	8	13,72 mm	1,245 mm	1,651 mm	1,854 mm	2,235 mm	3,023 mm	---	---
⅜	10	17,15 mm	1,245 mm	1,651 mm	1,854 mm	2,311 mm	3,200 mm	---	---
½	15	21,34 mm	1,651 mm	2,108 mm	---	2,769 mm	3,734 mm	---	7,468 mm
¾	20	26,67 mm	1,651 mm	2,108 mm	---	2,870 mm	3,912 mm	---	7,823 mm
1	25	33,40 mm	1,651 mm	2,769 mm	---	3,378 mm	4,547 mm	---	9,093 mm
1¼	32	42,16 mm	1,651 mm	2,769 mm	2,972 mm	3,556 mm	4,851 mm	---	9,703 mm
1½	40	48,26 mm	1,651 mm	2,769 mm	3,175 mm	3,683 mm	5,080 mm	---	10,160 mm
2	50	60,33 mm	1,651 mm	2,769 mm	3,175 mm	3,912 mm	5,537 mm	6,350 mm	11,074 mm
2½	65	73,03 mm	2,108 mm	3,048 mm	4,775 mm	5,156 mm	7,010 mm	7,620 mm	14,021 mm
3	80	88,90 mm	2,108 mm	3,048 mm	4,775 mm	5,486 mm	7,620 mm	8,890 mm	15,240 mm
3½	90	101,60 mm	2,108 mm	3,048 mm	4,775 mm	5,740 mm	8,077 mm	---	16,154 mm

Ống từ 4" tới 8" (từ DN100 - DN200)

Inch	DN mm	ĐK ngoài (mm)	Độ dày thành ống (mm)
			SCH 5	SCH 10	SCH 20	SCH 30	SCH 40 STD	SCH 60	SCH 80	SCH 100	SCH 120	SCH 140	SCH 160
4	100	114,30 mm	2,108 mm	3,048 mm	---	4,775 mm	6,020 mm	7,137 mm	8,560 mm	---	11,100 mm	---	13,487 mm
4½	115	127,00 mm	---	---	---	---	6,274 mm	---	9,017 mm	---	---	---	---
5	125	141,30 mm	2,769 mm	3,404 mm	---	---	6,553 mm	---	9,525 mm	---	12,700 mm	---	15,875 mm
6	150	168,28 mm	2,769 mm	3,404 mm	---	---	7,112 mm	---	10,973 mm	---	14,275 mm	---	18,263 mm
8	200	219,08 mm	2,769 mm	3,759 mm	6,350 mm	7,036 mm	8,179 mm	10,312 mm	12,700 mm	15,062 mm	18,237 mm	20,625 mm	23,012 mm

Ống từ 10" tới 24" (từ DN250 - DN600)

Inch	DN mm	ĐK ngoài (mm)	Độ dày thành ống (mm)
			SCH 5s	SCH 5	SCH 10s	SCH 10	SCH 20	SCH 30
10	250	273,05 mm	3,404 mm	3,404 mm	4,191 mm	4,191 mm	6,350 mm	7,798 mm
12	300	323,85 mm	3,962 mm	4,191 mm	4,572 mm	4,572 mm	6,350 mm	8,382 mm
14	350	355,60 mm	3,962 mm	3,962 mm	4,775 mm	6,350 mm	7,925 mm	9,525 mm
16	400	406,40 mm	4,191 mm	4,191 mm	4,775 mm	6,350 mm	7,925 mm	9,525 mm
18	450	457,20 mm	4,191 mm	4,191 mm	4,775 mm	6,350 mm	7,925 mm	11,100 mm
20	500	508,00 mm	4,775 mm	4,775 mm	5,537 mm	6,350 mm	9,525 mm	12,700 mm
24	600	609,60 mm	5,537 mm	5,537 mm	6,350 mm	6,350 mm	9,525 mm	14,275 mm

Inch	Độ dày thành ống (mm)
	SCH 40s	SCH 40	SCH 60	SCH 80s	SCH 80	SCH 100	SCH 120	SCH 140	SCH 160
10	9,271 mm	9,271 mm	12,700 mm	12,700 mm	15,062 mm	18,237 mm	21,412 mm	25,400 mm	28,575 mm
12	9,525 mm	10,312 mm	12,700 mm	12,700 mm	17,450 mm	21,412 mm	25,400 mm	28,575 mm	33,325 mm
14	9,525 mm	11,100 mm	15,062 mm	12,700 mm	19,050 mm	23,800 mm	27,762 mm	31,750 mm	35,712 mm
16	9,525 mm	12,700 mm	16,662 mm	12,700 mm	21,412 mm	26,187 mm	30,937 mm	36,500 mm	40,462 mm
18	9,525 mm	14,275 mm	19,050 mm	12,700 mm	23,800 mm	29,362 mm	34,925 mm	39,675 mm	45,237 mm
20	9,525 mm	15,062 mm	20,625 mm	12,700 mm	26,187 mm	32,512 mm	38,100 mm	44,450 mm	49,987 mm
24	9,525 mm	17,450 mm	24,587 mm	12,700 mm	30,937 mm	38,887 mm	46,025 mm	52,375 mm	59,512 mm

Ghi chú: bảng này chỉ mang tính chất tham khảo.