Product Description

Stainless Steel Welded Pipe Factory:

Holic Oil Pipeline Co., LTD.

Stainless Steel Welded Pipe Basics:

The stainless steel pipe is a high carbon steel pipe made of stainless steel materials. Its chromium content is relatively high comparing with other carbon steel pipes, mild steel pipes so it is often called High alloy steel pipes by insiders of steel industry. So what exactly is stainless steel and how to choose quality stainless steel pipes? As senior and trusted steel manufacturer, we will give you the answers.

What is Stainless Steel Pipe?

Stainless steel refers to the alloy steel which can resist the corrosion of weak corrosive medium such as air, steam, water and chemical corrosive medium such as acid, alkali and salt. The corrosion resistance of stainless steel depends on the alloy elements contained in the steel. The basic alloy elements of stainless steel include nickel, molybdenum, titanium, niobium, copper, nitrogen, etc.

Stainless steel belongs to alloy steel, a kind of high alloy steel, which contains a lot of chromium, enough nickel and a certain amount of titanium. The role of chromium is to make the steel corrosion resistant, and the role of nickel is to reduce the austenitizing temperature of stainless steel. The total content of alloy elements can reach 10-28%, so it is a high alloy steel.

Advantages of stainless steel pipes

• Luster and Polishing surface

Our stainless steel is polished to ensure quality.

• Corrosion resistance

When the content of chromium atom in steel is not less than 12.5%, electrochemical corrosion can be prevented. Most stainless steel products are required to have good corrosion resistance, such as tableware, kitchen utensils, water heaters, water dispensers, etc. Some foreign buyers also test the corrosion resistance of the products.

• Excellent Solderability

Most of the finished products of stainless steel must have good weldability. Therefore, our stainless steel supplier can provide you with stainless steel with good weldability.

• Heat resistance

Stainless steel still has good physical and mechanical properties at high temperature.

Usage of stainless steel pipe

Although stainless steel pipes are higher cost to sources, according to its outstanding characteristics such as strength, anti rust, corrosion-resistance, stainless steel pipes have been applied in many industries and domains below

• Medical industry,
• Food and catering sector,
• Automotive and transportation industry,
• Construction and architecture domain,
• Energy and heavy industries.

ASTM A213/SA213, ASTM A312/SA312, ASTM A789
Austenitic		Ferritic & Martensitic	Ferritic / Austenitic
TP 304	TP 316H	TP 405	S32900
TP 304L	TP 316Ti	TP 410	S31803
TP 304H	TP 321	TP 430	S32205
TP 310S	TP 312H		S32750
TP 310H	TP 347		S31500
TP 316	TP 347H
TP 316L

Stainless steel pipe dimension as per astm & weight

Nominal		Outside Diameter	Sch 5S		Sch 10S		Sch-40S		Sch-80S		Sch-160S		Sch-XXS
mm	inch	mm	WT mm	Weight (Kg/mt)	WT mm	Weight (Kg/mt)	WT mm	Weight (Kg/mt)	WT mm	Weight (Kg/mt)	WT mm	Weight (Kg/mt)	WT mm	Weight (Kg/mt)
3	1/8	10.3	1.24	0.276	1.24	0.28	1.73	0.37	2.41	0.47	–	–	–	–
6	1/4	13.7	1.24	0.390	1.65	0.49	2.24	0.631	3.02	0.80	–	–	–	–
10	3/8	17.1	1.24	0.490	1.65	0.63	2.31	0.845	3.20	1.10	–	–	–	–
15	1/2	21.3	1.65	0.800	2.11	1.00	2.77	1.27	3.75	1.62	4.75	1.94	7.47	2.55
20	3/4	26.7	1.65	1.03	2.11	1.28	2.87	1.68	3.91	2.20	5.54	2.89	7.82	3.63
25	1	33.4	1.65	1.30	2.77	2.09	3.38	2.50	4.55	3.24	6.35	4.24	9.09	5.45
32	1 1/4	42.2	1.65	1.65	2.77	2.70	3.56	3.38	4.85	4.47	6.35	5.61	9.70	7.77
40	1 1/2	48.3	1.65	1.91	2.77	3.11	3.68	4.05	5.08	5.41	7.14	7.25	10.16	9.54
50	2	60.3	1.65	2.40	2.77	3.93	3.91	5.44	5.54	7.48	8.74	11.1	11.07	13.44
65	2 1/2	73.0	2.11	3.69	3.05	5.26	5.16	8.63	7.01	11.4	9.53	14.9	14.2	20.39
80	3	88.9	2.11	4.51	3.05	6.45	5.49	11.30	7.62	15.2	11.1	21.3	15.24	27.65
100	4	114.3	2.11	5.84	3.05	8.36	6.02	16.07	8.56	22.3	13.49	33.54	17.12	41.03
125	5	141.3	2.77	9.47	3.40	11.57	6.55	21.8	9.53	31.97	15.88	49.11	19.05	57.43
150	6	168.3	2.77	11.32	3.40	13.84	7.11	28.3	10.97	42.7	18.2	67.56	21.95	79.22
200	8	219.1	2.77	14.79	3.76	19.96	8.18	42.6	12.7	64.6	23.0	111.2	22.23	107.8
250	10	273.1	3.40	22.63	4.19	27.78	9.27	60.5	12.7	96.0	28.6	172.4	25.40	155.15
300	12	323.9	3.96	31.25	4.57	36.00	9.52	73.88	12.7	132.0	33.32	238.76	25.40	186.97
350	14	355.6	3.96	34.36	4.78	41.3	11.13	94.59	19.05	158.08	35.71	281.70	–	–
400	16	406.4	4.19	41.56	4.78	47.29	12.7	123.30	21.41	203.33	40.46	365.11	–	–
450	18	457.2	4.19	46.80	4.78	53.42	14.27	155.80	23.8	254.36	45.71	466.40	–	–
500	20	508.0	4.78	59.25	5.54	68.71	15.09	183.42	26.19	311.2	49.99	564.68	–	–
600	24	609.6	5.54	82.47	6.35	94.45	17.48	255.41	30.96	442.08	59.54	808.22	–	–

Weight & thickness of S.S guage pipes

Dimension				10 SWG(3.2MM)	12 SWG(2.6MM)	14 SWG(2.1MM)	16 SWG(1.65MM)	18 SWG (1.2MM)	19 SWG(1.0MM)
Size			OD	Weight/MTR	Weight/MTR	Weight/MTR	Weight/MTR	Weight/MTR	Weight/MTR
1/2″			12.7	0.754	0.651	0.552	0.452	0.342	0.290
5/8″			15.875	1.006	0.856	0.718	0.582	0.437	0.369
3/4″			19.05	1.258	1.061	0.883	0.712	0.531	0.448
1″			25.4	1.762	1.470	1.214	0.972	0.720	0.605
1 1/4″			31.75	2.266	1.880	1.544	1.232	0.909	0.763
1 1/2″			38.1	2.770	2.289	1.875	1.492	1.098	0.920
2″			50.8	3.778	3.108	2.537	2.012	1.476	1.235
2 1/2″			63.5	4.786	3.928	3.198	2.531	1.854	1.550
3″			76.2	5.794	4.747	3.860	3.051	2.232	1.865
3 1/2″			88.9	6.802	5.566	4.521	3.571	2.610	2.180
4″			101.6	7.810	6.385	5.183	4.091	2.988	2.495

Value-add services

Stainless Steel Pipe Polishing	Stainless can polish nearly any stainless steel pipe item to a #4 polish, #6 Polish, #7 polish or a #8 mirror finish. Stainless steel polished pipes can also be cut to size.
Stainless Steel Pipe Beveling	Stainless can bevel the edges of stainless steel plate to prepare for welding or other processes.
Stainless Steel Pipe Honing & Turning	Stainless can hone pipe and tube, using a precision abrasion process in order to obtain a desired finish or close dimensional tolerance.
Heatreating & Annealing	Some grades of stainless steel pipe can be heatreated to change the mechanical properties.
Positive Material Identification (PMI)	Stainless can perform PMI testing in house for most stainless steel grades, or we can work with independent labs to complete PMI in order to meet customer specifications.
UT Testing	In some cases, UT testing of the stainless steel plates may be required. We can assist you with this requirement.

Stainless Steel Seamless Pipe Tolerances

NPS Designator	Permissible Variations in Outside Diameter
	Over In.	Under In.
1/8 to 1-1/2, incl	1/64 (0.015)	1/32 (0.031)
Over 1-1/2 to 4, incl	1/32 (0.031)	1/32 (0.031)
Over 4 to 8, incl	1/16 (0.062)	1/32 (0.031)
Over 8 to 18, incl	3/23 (0.093)	1/32 (0.031)

 

Nominal Wall Thickness:

• Nominal Wall Tolerance Plus 12.5%, Minus 12.5%
• These do not conform to the American National Standard for Welded and Seamless Wrought Steel Pipe
  (ANSI B 36.10 – 1979)

NPS Designator	Outside Diameter in.	Schedule 10S in.	Schedule 40S in.	Schedule 80S in.	Schedule 160 in.	Schedule XX in.
1/4	0.540	0.065	0.088	0.119
3/8	0.675	0.065	0.091	0.126
1/2	0.840	0.083	0.109	0.147	.188	.294
3/4	1.050	0.083	0.113	0.154	.218	.308
1.0	1.315	0.109	0.133	0.179	.250	.358
1 1/4	1.660	0.109	0.140	0.191	.250	.382
1 1/2	1.900	0.109	0.145	0.200	.281	.400
2	2.375	0.109	0.154	0.218	.343	.436
2 1/2	2.875	0.120	0.203	0.276	.375	.552
3	3.500	0.120	0.216	0.300	.438	.600
3 1/2	4.000	0.120	0.226	0.318		.636
4	4.500	0.120	0.237	0.337	.534	.674
5	5.563	0.134	0.258	0.375	.625	.750
6	6.625	0.134	0.280	0.432	.719	.864
8	8.625	0.148	0.322	0.500	.906	.875
10	10.750	0.165	0.365	0.500	1.125
12	12.750	0.180	0.375	0.500	1.312
14	14.000	0.188	0.375	0.500	1.406
16	16.000	0.188	0.375	0.500	1.594

Minimum Wall Thickness on Inspection:

• The following equation, upon which this table is based, may be applied to calculate minimum wall thicknesses from nominal wall thickness:
  • tn * 0.875 = tm
    Where:
    tn = nominal wall thickness, in. [mm], and
    tm= minimum wall thicknesses, in. [mm]
  • The wall thickness is inch-pound units is rounded to three decimal places in accordance with the rounding method of Practice E29. The wall thickness in SI units is rounded to one decimal place in accordance with the rounding method of Practice E29.
• This table is a master table covering wall thicknesses available in the purchase of different classifications of pipe, but it is not meant to imply that all the walls listed herein are necessarily obtainable for the applicable product specification.

Nominal Thickness		Minimum Thickness on Inspection		Nominal Thickness		Minimum Thickness on Inspection		Nominal Thickness		Minimum Thickness on Inspection
in.	mm	in	mm	in	mm	in	mm	in	mm	in	mm
0.068	1.7	0.060	1.5	0.294	7.5	0.257	6.5	0.750	19.0	0.658	16.6
0.068	2.2	0.077	2.0	0.300	7.6	0.262	6.7	0.812	20.6	0.710	18.0
0.091	2.3	0.080	2.0	0.307	7.8	0.269	6.8	0.843	21.4	0.736	18.7
0.095	2.4	0.083	2.1	0.308	7.8	0.270	6.9	0.854	21.7	0.756	19.2
0.113	2.9	0.099	2.5	0.312	7.9	0.273	6.9	0.875	22.2	0.766	19.5
0.119	3.0	0.104	2.6	0.318	8.1	0.278	7.1	0.906	23.0	0.783	20.1
0.125	3.2	0.109	2.8	0.322	8.2	0.282	7.2	0.937	23.8	0.820	20.8
0.126	3.2	0.110	2.8	0.330	8.4	0.289	7.3	0.968	24.6	0.847	21.5
0.133	3.4	0.116	2.9	0.337	8.6	0.295	7.5	1.000	25.4	0.875	22.2
0.140	3.6	0.122	3.1	0.343	8.7	0.300	7.6	1.031	26.2	0.902	22.9
0.145	3.7	0.127	3.2	0.344	8.7	0.301	7.6	1.062	27.0	0.929	23.6
0.147	3.7	0.129	3.3	0.358	9.1	0.313	8.0	1.083	27.8	0.956	24.3
0.154	3.9	0.135	3.4	0.365	9.3	0.319	8.1	1.125	28.6	0.984	25.0
0.156	4.0	0.136	3.5	0.375	9.5	0.328	8.3	1.156	29.4	1.012	25.7
0.179	4.5	0.157	4.0	0.382	9.7	0.334	8.5	1.218	30.9	1.066	27.1
0.187	43.7	0.164	4.2	0.400	10.2	0.350	8.9	1.250	31.8	1.094	27.8
0.188	4.8	0.164	4.2	0.406	10.3	0.355	9.0	1.281	32.5	1.121	28.5
0.191	4.9	0.167	4.2	0.432	10.4	0.378	9.6	1.312	33.3	1.148	29.2
0.200	5.1	0.175	4.4	0.436	11.1	0.382	9.7	1.343	34.1	1.175	29.8
0.203	5.2	0.178	4.5	0.437	11.1	0.382	9.7	1.375	34.9	1.203	30.6
0.216	5.5	0.189	4.8	0.438	11.1	0.383	9.7	1.406	35.7	1.230	31.2
0.218	5.5	0.191	4.9	0.500	12.7	0.438	11.1	1.436	36.5	1.258	32.0
0.219	5.6	0.192	4.9	0.531	13.5	0.465	11.8	1.500	36.1	1.312	33.3
0.226	5.7	0.196	5.0	0.552	14.0	0.483	12.3	1.531	38.9	1.340	34.0
0.237	6.0	0.207	5.2	0.562	14.3	0.492	12.5	1.562	39.7	1.367	34.7
0.250	6.4	0.219	5.6	0.593	15.1	0.519	13.2	1.593	40.5	1.394	35.4
0.258	6.6	0.226	5.7	0.600	15.2	0.525	13.3	1.750	44.5	1.531	38.9
0.276	7.0	0.242	6.1	0.625	15.9	0.547	13.9	1.781	45.2	1.558	39.6
0.277	7.0	0.242	6.1	0.656	16.6	0.573	14.6	1.812	46.0	1.586	49.3
0.279	7.1	0.244	6.2	0.674	17.1	0.590	15.0	1.968	50.0	1.772	43.7
0.280	7.1	0.245	6.2	0.687	17.4	0.601	15.3	2.062	52.4	1.804	45.8
0.281	7.1	0.246	6.2	0.719	18.3	0.629	16.0	2.343	59.5	2.050	52.1

Our advantages:

As a leading brand of oil pipeline products in China, Holic^® is working on providing high quality Stainless Steel Seamless Pipes and Tubes with most competitive price.