Marine Grade Stainless Steel Tube

Marine grade stainless steel tubes are specifically engineered to withstand the conditions of environments. These tubes are known for their durability and resistance making them a popular choice, in the world of steel products.

The majority of marine grade stainless steel tubes are made from 316 steel, which is commonly referred to as "grade." This specific grade offers increased resistance to chloride corrosion thanks to the addition of molybdenum. This element significantly improves the longevity and resilience of the tubes in applications.

It's important to note that marine grade stainless steel tubes have many advantages over corrosion resistance. They also possess strength and flexibility making them ideal for heavy duty applications. Additionally, their lower carbon content helps reduce precipitation during welding. The higher nickel content in comparison to grade steel provides improved formability and better resistance against pitting and crevice corrosion.

Apart from being used in environments like docks, shipbuilding and offshore oil rigs, marine grade stainless steel tubes also find wide applications in chemical processing units as well as industries such as food processing and pharmaceuticals where high corrosion resistance is crucial. Their easy maintenance, appearance and exceptional durability make them a popular choice, for a range of industrial applications.

Stainless steel tubes offer a high performance solution for demanding industrial environments. These tubes' unique composition gives them the strength to resist corrosion. Low maintenance requirements and ability to be recycled extensively make them a worthwhile investment. Opting for marine grade stainless steel tubes demonstrates a commitment to quality, performance and environmental sustainability.

Specification

Standards	-
Types	Welded, Seamless, ERW, Fabricated, CEW, CDW, CDS, DOM
Size range	1/2" OD - 12" OD
Production technique	Decoiling, Punching, Bending, Welding, Cutting, Moulding
Standards	ASTM, AISI, JIS, DIN, EN, SUS, GB
Form	Round, Hydraulic, Coiled, Square, U Shape, Rectangular, Straight, Honed Tubes, Pan Cake Coils
Thickness Range	SCH 10, SCH 160, SCH XXH, SCH XXS, SCH 5, SCH 40, SCH XS, SCH 80S, SCH 80
Custom Size/Thickness	Available
End	Treaded, Beveled End, Plain End
Surface Finish	8K, 1D, No.3, 180G, BA, No.4, 500G, No.1, Mirror Polished, 320G, HL, No.8, 400G, 2B, 600G or 800G Mirror finish Tubing, 2D, 400G Satin/ Hairline or Custom Finish as per customer's specification.
Marking Standard	Name of Manufacturer
	Schedule
	Pressure Class
	Tube Size, etc
Test Certificates	Third Party Inspection Report
	Manufacturer Test Certificate
	Raw Materials Certificate
	100% Radiography Test Report
	Laboratory Test Certificate from Govt. Approved Lab
	EN 10204/3.1B, EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)

Available Tubes in Our Warehouse

Thin Wall Tubing

Seamless Tube

Erw Tube

Bright Annealed Tube

Coil Tubing

Condenser Tube

Welded Tube

Heat Exchanger Tube

Small Diameter Tubing

Equivalent Grades

Stainless Steel Heat Exchanger tube Standard	UNS	EN	WERKSTOFF NR.	JIS	GOST	BS	AFNOR
SS 304	S30400	X5CrNi18-10	1.4301	SUS 304	08Х18Н10	304S31	Z7CN18‐09
SS 304L	S30403	X2CrNi18-9 / X2CrNi19-11	1.4306 / 1.4307	SUS 304L	03Х18Н11	3304S11	Z3CN18‐10
SS 304H	S30409	–	1.4301	–	–	–	–
SS 310	S31000	X15CrNi25-20	1.4841	SUS 310	20Ch25N20S2	310S24	–
SS 310S	S31008	X8CrNi25-21	1.4845	SUS 310S	20Ch23N18	310S16	–
SS 310H	S31009	–	–	–	–	–	–
SS 316	S31600	X5CrNiMo17-12-2 / X3CrNiMo17-13-3	1.4401 / 1.4436	SUS 316	–	316S31 / 316S33	Z7CND17‐11‐02
SS 316L	S31603	X2CrNiMo17-12-2 / X2CrNiMo18-14-3	1.4404 / 1.4435	SUS 316L	03Ch17N14M3 / 03Ch17N14M2	316S11 / 316S13	Z3CND17‐11‐02 / Z3CND18‐14‐03
SS 316H	S31609	–	1.4401	–	–	–	–
SS 316Ti	S31635	X6CrNiMoTi17-12-2	1.4571	SUS 316Ti	08Ch17N13M2T	320S31	Z6CNDT17‐123
SS 317	S31700	–	1.4449	SUS 317	–	–	–
SS 317L	S31703	X2CrNiMo18-15-4	1.4438	SUS 317L	–	–	–
SS 321	S32100	X6CrNiTi18-10	1.4541	SUS 321	–	–	–
SS 321H	S32109	X12CrNiTi18-9	1.4878	SUS 321H	–	–	–
SS 347	S34700	X6CrNiNb18-10	1.4550	SUS 347	08Ch18N12B	–	–
SS 347H	S34709	X6CrNiNb18-12	1.4961	SUS 347H	–	–	–
SS 904L	N08904	X1NiCrMoCu25-20-5	1.4539	SUS 904L	STS 317J5L	904S13	Z2 NCDU 25-20

Chemical Composition

Grades	Carbon	Manganese	Phosphorus	Sulfur	Silicon	Nickel	Chromium	Other
SS 304	0.08	2	0.04	0.03	0.075	8.00 11.00	18.00 20.00
SS 304L	0.035	2 .00	0.04	0.03	0.75	8.00 13.00	18.00 20.00
SS 304H	0.04 0.1	2	0.04	0.03	0.75	8.00 11	18.00 20
SS 310	0.15	2	0.04	0.03	0.75	19.00 22	24.00 26
SS 316	008	2.00	0.040	0.030	0.75	11.00 4.00	16.00 18.00	Mo2.00- 3.00
SS 316L	0.035	2	0.04	0.03	0.75	10.00 15	16.00 18	Mo 2.00 3.00
SS 316H	0_04 0.10	I 2.00	0040	0.030	0.75	11.00 14.00	16.00 18.00	Mo2.00-3.00
SS 317	0.08	2	0.04	0.03	0.75	11.00 14	18.00 20	Mo 3.00 4.00
SS 321	0.48	203	0.04	0.03	0.75	9.00 13	17.00 20	Ti 5XC-0.60
SS 347	0.08	200	0.04	0.03	0.75	7.00 13	17.00 20	Cb + Ta 10 XC-1.00
21-6-9	0.04	8.00	60	0.03	1	5.50 7.5	19.00 21.5	N 0.15 0.40
SS 416	0.15	1.25	0.066	0.15	1.00		12.00 14.00

Marine Grade Tube Schedule

Nominal wall thickness comparsion table for stainless steel Tube (ASME B36.10 & B36.19)
DNmm	DNin	φmm	SCH10S	SCH40S	Sch40
6	1/8	10.3	1.24	1.73	1.73
8	1/4	13.7	1.65	2.24	2.24
10	3/8	17.1	1.65	2.31	2.31
15	1/2	21.3	2.11	2.77	2.77
20	3/4	26.7	2.11	2.87	2.87
25	1	33.4	2.77	3.38	3.38
32	1 1/4	42.2	2.77	3.56	3.56
40	1 1/2	48.3	2.77	3.68	3.68
50	2	60.3	2.77	3.91	3.91
65	2 1/2	76	3.05	5.16	5.16
80	3	88.9	3.05	5.49	5.49
90	3 1/2	101.6	3.05	5.74	5.74
100	4	114.3	3.05	6.02	6.02
125	5	141.3	3.4	6.55	6.55
150	6	168.3	3.4	7.11	7.11
200	8	219.1	3.76	8.18	8.18
250	10	273	4.19	9.27	9.27
300	12	323.8	4.57	9.53	10.31
350	14	355.6	4.78		11.13
400	16	406.4	4.78		12.7
450	18	457	4.78		14.27
500	20	508	5.54		15.09
550	22	559	5.54
600	24	610	6.35		17.48
650	26	660
700	28	711
750	30	762	7.92
800	32	813			17.48
850	34	864			17.48
900	36	914			19.05

Pressure Rating (psig)
Tube Size (inches)	Tube Schedule	Temperature (oF)
Tube Size (inches)	Tube Schedule	100	200	300	400	500	600	650	700	750
1"	40	3048	2629	2362	2171	2019	1924	1867	1824	1810
	80	4213	3634	3265	3002	2791	2659	2580	2528	2501
	160	6140	5296	4759	4375	4068	3876	3761	3684	3646
1 1/2"	40	2257	1947	1750	1608	1496	1425	1383	1354	1340
	80	3182	2744	2466	2267	2108	2009	1949	1909	1889
	160	4619	3984	3580	3291	3060	2916	2829	2772	2743
2"	40	1902	1640	1474	1355	1260	1201	1165	1141	1129
	80	2747	2369	2129	1957	1820	1734	1682	1648	1631
	160	4499	3880	3486	3205	2980	2840	2755	2699	2671
3"	40	1806	1558	1400	1287	1196	1140	1106	1084	1072
	80	2553	2202	1979	1819	1691	1612	1564	1532	1516
	160	3840	3312	2976	2736	2544	2424	2352	2304	2280
4"	40	1531	1321	1187	1091	1014	967	938	919	909
	80	2213	1909	1715	1577	1466	1397	1355	1328	1314
	160	3601	3106	2791	2566	2386	2273	2206	2161	2138
5"	40	1342	1158	1040	956	889	847	822	805	797
	80	1981	1709	1535	1411	1312	1250	1213	1189	1176
	160	3414	2945	2646	2433	2262	2155	2091	2049	2027
6"	40	1219	1052	945	869	808	770	747	732	724
	80	1913	1650	1483	1363	1267	1208	1172	1148	1136
	160	3289	2836	2549	2343	2179	2076	2014	1973	1953
8"	40	1073	926	832	765	711	678	657	644	637
	80	1692	1459	1311	1205	1121	1068	1036	1015	1005
	160	3175	2738	2460	2262	2103	2004	1944	1905	1885
10"	40	974	840	755	694	645	615	596	584	578
	80	1609	1388	1247	1147	1066	1016	986	966	956
	160	3147	2714	2439	2242	2085	1986	1927	1880	1868