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TECHNICAL SPECIFICATIONS

MANUFACTURING PROCESS

ISO STANDARD FOR MILD STEEL TUBES

ISO STANDARD FOR MILD STEEL TUBES [EXTRACT FROM ISO-65-2981 (E)]
DN	Designation of thread	Outside Diameter D mm	Thickness (T) and masses per unit length (M) according to the series
			Heavy Series		Medium Series		Light Series 1		Light Series 2
			T mm	Screwed Socketed M kg/m	T mm	Screwed Socketed M kg/m	T mm	Screwed Socketed M kg/m	T mm	Screwed Socketed M kg/m
15	½	21.3	3.2	1.45	2.6	1.22	2.3	1.09	2.0	0.956
20	¾	26.9	3.2	1.88	2.6	1.57	2.3	1.40	2.3	1.39
26	1	33.7	4.0	2.95	3.2	2.43	2.9	2.22	2.6	2.00
32	1¼	42.4	4.0	3.82	3.2	3.13	2.9	2.85	2.6	2.57
40	1½	48.3	4.0	4.41	3.2	3.60	2.9	3.28	2.9	3.27
50	2	60.3	4.5	6.26	3.6	5.10	3.2	4.56	2.9	4.15
65	2½	76.1	4.5	8.05	3.6	6.54	3.2	5.85	3.2	5.83
80	3	88.9	5.0	10.5	4.0	8.53	3.6	7.72	3.2	6.89
100	4	114.3	5.4	14.8	4.5	12.5	4.0	11.1	3.6	10.0
125	5	139.7	5.4	18.4	5.0	17.1
150	6	165.1	5.4	21.9	5.0	20.4

Tolerances

Thickness:	Heavy, Medium & Light Series 1 :	+ Not Limited - 12.5%
	Light Series 2 :	+ Not Limited - 8%

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Index to Technical Specification

Tubes & Pipes	Range of Pipes \| General Applications \| Manufacturing Process Technical Specifications Of Pipes and Tubes ERW Steel Tubes \| ERW Steel Pipes \| Galvanized Black Steel Tubes Black Galvanized Pipes and Tubes \| Mild Steel Tubes Plain End Casing Pipes
Galvanized / Cold Rolled Sheets-Coils	Galvanized Sheets \| Galvanized Coils \| Cold Rolled Steel Technical Specification Of Galvanised Sheets & Coils
Coal Division	Non Coking Steam Coals \| Hard Coking Coals
Hollow Sections	Square Hollow Sections \| Rectangular Hollow Sections Round Hollow Sections
Steel Structure	Electricity Transmission Towers / Grid Towers \| Telecommunication Structures \| Swaged Poles Technical Specification of Swaged Poles
Good Luck Industries	About Good Luck Industries \| Tubes \| List of Plant and Machinery \| Precision of CDW Tubes \| Major Applications
Forgings	Company Profile \| The Art of Processing \| Major Applications \| Blinds & Tube Sheet \| Shafts \| Flanges \| Gear Blanks

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