Spirally welded pipes

Dimensions

Steel pipes for pressure purposes are manufactured for delivery from the works.

Theoretical density = 7850 kg/m3

Spiral welds

External diameter Mass (kg/m) by wall thickness t (mm)
DN	D mm	5.6	6.3	7.1	8.0	8.8	10.0	11	12.5	14.2	16
400	406.4	55.4	62.2	69.9	78.6	86.3	97.8	107	121.0
450	457.0	62.3	70.0	78.8	88.6	97.3	110.0	121	137.0
500	508.0	69.4	77.9	87.7	98.6	108.0	123.0	135	153.0	173.0
600	610.0	83.5	93.8	106.0	119.0	130.0	148.0	162	184.0	209.0
700	711.0	97.4	109.0	123.0	139.0	152.0	173.0	190	215.0	244.0	274
800	813.0		125.0	141.0	159.0	175.0	198.0	218	247.0	280.0	314
900	914.0		141.0	159.0	179.0	196.0	223.0	245	278.0	315.0	354
1000	1016.0			177.0	199.0	219.0	248.0	273	309.0	315.0	395
1200	1220.0				239.0	263.0	298.0	328	372.0	422.0	475

Most common spiral weld dimensions

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Properties

Mechanical properties of steel grades

Steel grade	Standard	Yield strength R_eHN/mm²Minimum	Tensile strength R_m N/mm²	Elongation A₅ % Minimum	Impact properties temperature t °C	Absorbed energy KV J Minimum
P235TR1¹⁾	EN 10217-1	235	360 - 500	25	–	–
P235TR2	EN 10217-1	235	360 – 500	25	0 -10	40 28 ²⁾
P265TR1 ¹⁾	EN 10217-1	265	410 – 570	21	–	–
P265TR2	EN 10217-1	265	410 – 570	21	0 -10	40 28 ²⁾
P235GH	EN 10217-5	235	360 – 500	25	0 -10 -20	40 ²⁾28 ²⁾28
P265GH	EN 10217-5	265	410 – 570	23	0 -10	40 ²⁾28 ²⁾

_{1) Tubes made to these material grades are unlikely to support the essential requirements of the PED 97/23/EC directive unless other criteria are taken into account, see Annex I, section 7.5 of the directive.}
_{2) Impact properties are tested optionally as required in the standards.}

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Order and delivery

Ruukki delivers spirally welded pipes based on European standards and customer's specifications within the diameter range DN 400 to 1200.

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