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Home > Products > Hygienic grade piping series > ASTM A312 A789 A269 304 304L 316L 2205 2507 Round Duplex Pipes Stainless Steel Seamless Tubes

ASTM A312 A789 A269 304 304L 316L 2205 2507 Round Duplex Pipes Stainless Steel Seamless Tubes

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Product Details

Type	Seamless		Technique	Cold Rolled
Material	Stainless steel		Section Shape	Round

Product Description

ASTM	ASTM A270 / ASME SA 270
Type	Ferritic/Austenitic Stainless Steel and Seamless and Welded Austenitic Sanitary Tubing
Wall	16 Gauge (0.065")
OD.	1/2”
OD Tolerance	+/-0.005” / +/-0.13MM
Length	20′
Length Tolerance	+1/8” / +3.18MM
WT Tolerance	+/-10%
Standard	3A / ASTM A270 / A270M
Material	SS 304L, SS 304, SS 316,SS 316L
Polish	Mechanical Polished
Packing	Ends Capped, Sleeved, Wooden Boxed
Finish	20Ra ID / 32Ra OD
Certification	3A – Food / Dairy Grade
Type	Seamless
Mill Test Certificate	EN10204 3.1

In stainless steel tubing for sanitary applications, precision and quality are two of the most important factors. The ASTM A270 standard plays a crucial role in ensuring that hygienic tubing meets the stringent requirements of industries such as food and beverage, pharmaceuticals, and biotechnology. We will cover what ASTM A270 is, its significance, and how it distinguishes itself from other similar quality standards.

What is ASTM A270?

ASTM A270 is a set of standards developed by the American Society for Testing and Materials (ASTM) that specifically addresses the requirements for seamless and welded austenitic stainless steel sanitary tubing intended for use in dairy and food industry and having special surface finishes. The standard encompasses various dimensions, mechanical properties, and surface finish requirements to ensure the tubes’ suitability for hygienic applications.

Key Features of ASTM A270:

· Material Specifications:
ASTM A270 focuses on austenitic stainless steel, which is known for its corrosion resistance and high levels of hygiene. Common grades include 304 and 316 stainless steel.

· Dimensional Specifications:
The standard specifies the dimensions of tubes, including outside diameter, wall thickness, and length. This ensures consistency and compatibility in various systems.

· Mechanical Properties:
ASTM A270 outlines mechanical properties such as tensile strength, yield strength, and elongation. These properties are crucial for withstanding the mechanical stresses that tubing may experience during installation and use.

· Surface Finish:
One of the key differentiators of ASTM A270 is its emphasis on surface finish. The standard categorizes surface finishes into specific classes, such as mechanically polished and electropolished, to meet the stringent cleanliness requirements of industries like pharmaceuticals.

Comparison with Other Standards:

While there are other standards related to stainless steel tubing, ASTM A270 stands out in its focus on hygienic applications. Let’s briefly compare it with some other relevant standards:

· ASTM A249:
ASTM A249 covers general stainless steel tubing, but it lacks the specific focus on the hygienic requirements found in ASTM A270. A249 may be suitable for less critical applications where surface finish and cleanliness are not as crucial.

· ASME BPE (Bioprocessing Equipment):
ASME BPE shares similarities with ASTM A270 but is specifically tailored for bioprocessing applications. It delves deeper into requirements for surface finish, materials, and fabrication techniques applicable to the pharmaceutical and biotechnology industries.

· DIN 11850:
This German standard is similar to ASTM A270 but caters to European markets. While it covers stainless steel tubes for food and chemical industries, the specifics may differ from ASTM A270.

Conclusion:

ASTM A270 stands as a benchmark for hygienic stainless steel tubing, ensuring that it meets the stringent requirements of industries where cleanliness and corrosion resistance are paramount. While other standards exist, their focus may differ, and choosing the right standard depends on the specific needs of the application. When it comes to hygienic tubing, ASTM A270 sets the standard for precision, quality, and reliability.

Dimensional Tolerances of Sanitary Stainless Steel Tubing

TUBE	SIZE OD		NOMINAL WALL THICKNESS		OUTSIDE DIAMETER TOLERANCE		LENGTH TOLERANCE		WALL THICKNESS TOLERANCE
	*(in)*	*(mm)*	*(in)*	*(mm)*	*(in)*	*(mm)*	*(in)*	*(mm)*	*(%)*
Sanitary Tubing	½	12.7	0.065	1.65	+/-0.005	+/-0.13	+⅛, -0	+3.18, -0	+/-10.0%
Stainless Steel Sanitary Tubing	¾	19.1	0.065	1.65	+/-0.005	+/-0.13	+⅛, -0	+3.18, -0	+/-10.0%
Sanitary Stainless Tubing	1	25.4	0.065	1.65	+/-0.005	+/-0.13	+⅛, -0	+3.18, -0	+/-10.0%
SS Sanitary Tube	1½	38.1	0.065	1.65	+/-0.008	+/-0.20	+⅛, -0	+3.18, -0	+/-10.0%
Sanitary Tubing	2	50.8	0.065	1.65	+/-0.008	+/-0.20	+⅛, -0	+3.18, -0	+/-10.0%
Stainless Steel Sanitary Pipe	2½	63.5	0.065	1.65	+/-0.010	+/-0.25	+⅛, -0	+3.18, -0	+/-10.0%
Sanitary Stainless Tubing	3	76.2	0.065	1.65	+/-0.010	+/-0.25	+⅛, -0	+3.18, -0	+/-10.0%
Sanitary Stainless Pipe	4	101.6	0.083	2.11	+/-0.015	+/-0.38	+⅛, -0	+3.18, -0	+/-10.0%
Stainless Steel Sanitary Tubing	6	152.4	0.109	2.77	+/-0.030	+/-0.76	+1, -0	+25.4, -0	+/-10.0%

Schedule Chart of Stainless Steel Welded Sanitary Tubing

PIPE	NB SIZES	SCH 5	SCH 10	SCH 40	SCH 80	SCH 160
SS Sanitary Tube	1/8″	√	√	√	√
Sanitary Tubing	1/4″	√	√	√	√
Stainless Steel Sanitary Tubing	3/8″	√	√	√	√
Sanitary Stainless Tubing	1/2″	√	√	√	√	√
SS Sanitary Tube	3/4″	√	√	√	√	√
Sanitary Tubing	1″	√	√	√	√	√
Stainless Steel Sanitary Pipe	1 1/4″	√	√	√	√	√
Sanitary Stainless Tubing	1 1/2″	√	√	√	√	√
Sanitary Stainless Pipe	2″	√	√	√	√	√
Stainless Steel Sanitary Tubing	2 1/2″	√	√	√	√	√
Sanitary Tubing	3″	√	√	√	√	√
Stainless Steel Sanitary Tubing	4″	√	√	√	√	√
Sanitary Stainless Tubing	5″	√	√	√	√
SS Sanitary Tube	6″	√	√	√	√

DIN EN 11866 Dimensions

Inner Surface

Hygienic class	Inner surface	Seam area inside
H1	Ra <; 1.6 µm	Ra <; 3.2 µm
H2	Ra <; 0.8 µm	Ra <; 1.6 µm
H3	Ra <; 0.8 µm	Ra <; 0.8 µm
H4	Ra <; 0.4 µm	Ra <; 0.4 µm
H5	Ra <; 0.25 µm	Ra <; 0.25 µm

Outer Surface

· with nominal Ra value: typ. ground Ra<1.0 µm with a marking for the hygiene class additionally carrying an "o"-tag (e.g. H2o)

· without nominal Ra value: pickled or bright-annealed

DIN 11866 Range A / 304L – 316L

OUTSIDE DIAMETER (MM)	WALL- THICKNESS (MM)	NOMINAL OUTSIDE DIAMETER	NOMINAL WALL THICKNESS	DIMENSIONAL STANDARD
8,00	1,00	DN 6	R.A	DIN 11866 Reihe A
10,00	1,00	DN 8	R.A	DIN 11866 Reihe A
13,00	1,50	DN 10	R.A	DIN 11866 Reihe A
19,00	1,50	DN 15	R.A	DIN 11866 Reihe A
23,00	1,50	DN 20	R.A	DIN 11866 Reihe A
29,00	1,50	DN 25	R.A	DIN 11866 Reihe A
35,00	1,50	DN 32	R.A	DIN 11866 Reihe A
41,00	1,50	DN 40	R.A	DIN 11866 Reihe A
53,00	1,50	DN 50	R.A	DIN 11866 Reihe A
70,00	2,00	DN 65	R.A	DIN 11866 Reihe A
85,00	2,00	DN 80	R.A	DIN 11866 Reihe A
104,00	2,00	DN 100	R.A	DIN 11866 Reihe A
129,00	2,00	DN 125	R.A	DIN 11866 Reihe A
154,00	2,00	DN 150	R.A	DIN 11866 Reihe A
204,00	2,00	DN 200	R.A	DIN 11866 Reihe A

DIN 11866 Range B / 304L – 316L

OUTSIDE DIAMETER (MM)	WALL- THICKNESS (MM)	NOMINAL OUTSIDE DIAMETER	NOMINAL WALL THICKNESS	DIMENSIONAL STANDARD
10,20	1,60	DN 6	R,B	DIN 11866 Reihe B
13,50	1,60	DN 8	R,B	DIN 11866 Reihe B
17,20	1,60	DN 10	R,B	DIN 11866 Reihe B
21,30	1,60	DN 15	R,B	DIN 11866 Reihe B
26,90	1,60	DN 20	R,B	DIN 11866 Reihe B
33,70	2,00	DN 25	R,B	DIN 11866 Reihe B
42,40	2,00	DN 32	R,B	DIN 11866 Reihe B
48,30	2,00	DN 40	R,B	DIN 11866 Reihe B
60,30	2,00	DN 50	R,B	DIN 11866 Reihe B
76,10	2,00	DN 65	R,B	DIN 11866 Reihe B
88,90	2,30	DN 80	R,B	DIN 11866 Reihe B
114,30	2,30	DN 100	R,B	DIN 11866 Reihe B
139,70	2,60	DN 125	R,B	DIN 11866 Reihe B
168,30	2,60	DN 150	R,B	DIN 11866 Reihe B
219,10	2,60	DN 200	R,B	DIN 11866 Reihe B

DIN 11866 Range C / 304L – 316L

OUTSIDE DIAMETER (MM)	WALL- THICKNESS (MM)	NOMINAL OUTSIDE DIAMETER	NOMINAL WALL THICKNESS	DIMENSIONAL STANDARD
6,35	0,89	DN 8	R,C	DIN 11866 Reihe C
9,53	0,89	DN 10	R,C	DIN 11866 Reihe C
12,70	1,65	DN 15	R,C	DIN 11866 Reihe C
19,05	1,65	DN 20	R,C	DIN 11866 Reihe C
25,40	1,65	DN 25	R,C	DIN 11866 Reihe C
38,10	1,65	DN 40	R,C	DIN 11866 Reihe C
50,80	1,65	DN 50	R,C	DIN 11866 Reihe C
63,50	1,65	DN 65	R,C	DIN 11866 Reihe C
76,20	1,65	DN 80	R,C	DIN 11866 Reihe C
101,60	2,11	DN 100	R,C	DIN 11866 Reihe C
152,40	2,77	DN 150	R,C	DIN 11866 Reihe C

Supply Cut to length ASTM A270 S2 Sanitary Tubes in all sizes as per Client requirement, see dimensions

Sizes chart of SS Sanitary Tubes

Tube OD	Product Type	Thikness	Grade
1/2	SS Sanitary Tube	0.065	304
1/2	Sanitary Tubing	0.065	316
3/4	Stainless Steel Sanitary Tubing	0.065	304
3/4	Sanitary Stainless Tubing	0.065	316
1	SS Sanitary Tube	0.065	304
1	Sanitary Tubing	0.065	316
1 1/2	Stainless Steel Sanitary Pipe	0.065	304
1 1/2	Sanitary Stainless Tubing	0.065	316
2	Sanitary Stainless Pipe	0.065	304
2	Stainless Steel Sanitary Tubing	0.065	316
2 1/2	Sanitary Tubing	0.065	304
2 1/2	Stainless Steel Sanitary Tubing	0.065	316
3	Sanitary Stainless Tubing	0.065	304
3	SS Sanitary Tube	0.065	316
4	Sanitary Tubing	0.083	304
4	Stainless Steel Sanitary Pipe	0.083	316
6	Sanitary Stainless Tubing	0.109	304
6	Sanitary Stainless Pipe	0.109	316
8	Stainless Steel Sanitary Tubing	0.109	304
8	Sanitary Tubing	0.109	316

Do you belong to following locations Please see what we supply here

Chile, Philippines, Iran, Canada	38*1.5mm Food Grade Sanitary 304/316L Stainless Steel Tube
United Arab Emirates (UAE), Europe, Norway, Romania	Stainless Steel Sanitary Triclamp Tube End Cap
Netherlands, Sweden, Russia, Malaysia	Food Grade 304 304L 316 316L 310S 321 Sanitary Seamless Stainless Steel Tube
Egypt, Malaysia, Mexico, Los Alamos -Mexico	Polished Stainless Steel Seamless Sanitary Tube
United Kingdom -UK, Singapore, Malaysia, NY 12203 (USA)	Sanitary Stainless Steel Welded Tubes Inner Polished 320g
UK, Dammam -KSA, Poland, Philippines	Sanitary Stainless Steel 304 Tube
Singapore, Qatar, Malaysia, Europe	Tp316 Seamed Stainless Steel Sanitary Grade Tube for Evaporator Concentrator
Malaysia, Czechia, Japan, Thailand	SS 304 Food Grade Stainless Steel Sanitary Welded Tube
China, Malaysia, Colombia, Bangladesh	316L 304 Mirror Polished Stainless Steel Pipe Sanitary Tube
Philippines, South Africa, Taiwan, Kuwait	A312/A270 Annealed 3A Stainless Steel Sanitary Tube/Square Tube
Malaysia, Bahrain, South Korea, Singapore	Stainless Steel Sanitary Pipe and Tube
Belgium, Philippines, Indonesia, UK	ASTM A213 TP304L Sanitary Grade Stainless Steel Pipe Steel Tube
Thailand, Oman, France, Hong Kong	Sanitary Spool Tube with Clamp Ends, Stainless Steel 304
Turkey, Malaysia, Germany	Stainless Steel Sanitary Welded Tube for Beer Industry
Finland, Dubai, USA, Malaysia	ASTM A270 Bright Annealed TP304 Sanitary Seamless Stainless Steel Tube
Brazil, UK, Saudi Arabia (KSA), Spain	Medical Sanitary Food Grade Welded Small Diameter Thin Wall Round Seamless Stainless Steel Capillary Tube
Singapore, UAE, South Africa, Europe	Sanitary Welded Stainless Steel Tube
Nigeria, Ellington -United States, Australia, Canada	Food Grade Stainless Steel Sanitary Shell and Heat Exchanger Copper Tubes
UAE, Singapore, Malaysia, Italy	Sanitary Grade 201 304 316 Polished Brushed Mirror Stainless Steel Square Pipe/Tube

Stainless Steel Seamless Sanitary Tube Pressure Rating

AVE. WALL INCHES	MIN YIELD STRENGTH (PSI)	MIN TENSILE STRENGTH (PSI)	*THEORETICAL BURST PRESSURE (PSI)**	WORKING PRESSURE (PSI) 25% OF BURST	THEORETICAL YIELD POINT (PSI)**	COLLAPSE PRESSURE * (PSI)**
0.250	0.020	30,000	75,000	14,286	3,571	5,714	4,416
0.250	0.028	30,000	75,000	21,649	5,412	8,660	5,967
0.250	0.035	30,000	75,000	29,167	7,292	11,667	7,224
0.250	0.049	30,000	75,000	48,355	12,089	19,342	9,455
0.250	0.065	30,000	75,000	81,250	20,313	32,500	11,544
0.375	0.020	30,000	75,000	8,955	2,239	3,582	3,029
0.375	0.028	30,000	75,000	13,166	3,292	5,266	4,145
0.375	0.035	30,000	75,000	17,213	4,303	6,885	5,077
0.375	0.049	30,000	75,000	26,534	6,634	10,614	6,816
0.375	0.065	30,000	75,000	39,796	9,949	15,918	8,597
0.500	0.020	30,000	75,000	6,522	1,630	2,609	2,304
0.500	0.028	30,000	75,000	9,459	2,365	3,784	3,172
0.500	0.035	30,000	75,000	12,209	3,052	4,884	3,906
0.500	0.049	30,000	75,000	18,284	4,571	7,313	5,304
0.500	0.065	30,000	75,000	26,351	6,588	10,541	6,786
0.500	0.083	30,000	75,000	37,275	9,319	14,910	8,307
0.625	0.020	30,000	75,000	5,128	1,282	2,051	1,859
0.625	0.028	30,000	75,000	7,381	1,845	2,953	2,568
0.625	0.035	30,000	75,000	9,459	2,365	3,784	3,172
0.625	0.049	30,000	75,000	13,947	3,487	5,579	4,335
0.625	0.065	30,000	75,000	19,697	4,924	7,879	5,591
0.625	0.083	30,000	75,000	27,124	6,781	10,850	6,910
0.625	0.095	30,000	75,000	32,759	8,190	13,103	7,734
0.625	0.109	30,000	75,000	40,172	10,043	16,069	8,639
0.750	0.028	30,000	75,000	6,052	1,513	2,421	2,156
0.750	0.035	30,000	75,000	7,721	1,930	3,088	2,669
0.750	0.049	30,000	75,000	11,273	2,818	4,509	3,664
0.750	0.065	30,000	75,000	15,726	3,931	6,290	4,749
0.750	0.083	30,000	75,000	21,318	5,330	8,527	5,905
0.750	0.095	30,000	75,000	25,446	6,362	10,179	6,637
0.750	0.109	30,000	75,000	30,733	7,683	12,293	7,453
0.750	0.120	30,000	75,000	35,294	8,824	14,118	8,064
0.875	0.020	30,000	75,000	3,593	898	1,437	1,340
0.875	0.028	30,000	75,000	5,128	1,282	2,051	1,859
0.875	0.035	30,000	75,000	6,522	1,630	2,609	2,304
0.049	30,000	75,000	9,459	2,365	3,784	3,172
0.875	0.065	30,000	75,000	13,087	3,272	5,235	4,126
0.875	0.083	30,000	75,000	17,560	4,390	7,024	5,152
0.875	0.095	30,000	75,000	20,803	5,201	8,321	5,807
0.875	0.109	30,000	75,000	24,886	6,221	9,954	6,543
0.875	0.120	30,000	75,000	28,346	7,087	11,339	7,100
1.000	0.028	30,000	75,000	4,449	1,112	1,780	1,633
1.000	0.035	30,000	75,000	5,645	1,411	2,258	2,027
1.000	0.049	30,000	75,000	8,149	2,037	3,259	2,796
1.000	0.065	30,000	75,000	11,207	2,802	4,483	3,647
1.000	0.083	30,000	75,000	14,928	3,732	5,971	4,567
1.000	0.095	30,000	75,000	17,593	4,398	7,037	5,159
1.000	0.109	30,000	75,000	20,908	5,227	8,363	5,827
1.000	0.120	30,000	75,000	23,684	5,921	9,474	6,336
1.000	0.134	30,000	75,000	27,459	6,865	10,984	6,963
1.250	0.035	30,000	75,000	4,449	1,112	1,780	1,633
1.250	0.049	30,000	75,000	6,380	1,595	2,552	2,260

Stainless Steel Sanitary Seamless Tube Hs Code

HS Code	Description
73269099	STAINLESS STEEL FITTING CSE BRAND FOR EXHIBITORS-SMS A270 SANITARY WELDED TUBING L=400.0mm ID/OD POLISHED
73269099	STAINLESS STEEL FITTING CSE BRAND FOR EXHIBITORS-D11850-2 A270 SANITARY WELDED TUBING L=400.0mm ID/OD POLISHED
73069090	A55800014G0002004W BPE WLD TUBING 1.65T SF4 2 316L (STAINLESS STEEL SANITARY FITINGS)
73069090	A55800014G0001504W BPE WLD TUBING 1.65T SF4 11/2 316L (STAINLESS STEEL SANITARY FITINGS)
73072900	A55800014G0000754T BPE SML TUBING 1. 65T SF4 3/4 316L (STAINLESS STEEL SANITARY FITINGS)
73072900	A55800014G0001004W BPE WLD TUBING 1. 65T SF4 1 316L (STAINLESS STEEL SANITARY FITINGS)
73069090	A55800014G0001004W BPE WLD TUBING 1.65T SF4 1 316L PIPE SML, SS316L, (STAINLESS STEEL SANITARY FITINGS)
73069090	A5580014G0000504T BPE SML TUBING 1.65T SF4 1/2 316L PIPE,SMLS,SS316L, (STAINLESS STEEL SANITARY FITINGS)

Food-grade Stainless Steel Tubing Chemical Composition

Element	304 (wt%)	316L (wt%)
Carbon (max)	0.035	0.035
Manganese (max)	2.00	2.00
Phosphorus (max)	0.040	0.040
Sulfur (max)	0.030	0.030**
Silicon (max)	0.75	0.75
Nickel	8.0 – 13.0	10.0 – 15.0
Chromium	18.0 – 20.0	16.0 – 18.0
Molybdenum	N/A	2.0 – 3.0
Iron	Balance	Balance
Copper	N/A	N/A
Nitrogen	N/A	N/A

Mechanical Properties of Stainless Steel Sanitary Tube

Material	Heat	Temperure	Tensile Strength	Yield Strength	Elongation %, Min
	Treatment	Min.	Ksi (MPa), Min.	Ksi (MPa), Min.
		º F(º C)
TP304	Solution	1900 (1040)	75(515)	30(205)	35
TP304L	Solution	1900 (1040)	70(485)	25(170)	35
TP316	Solution	1900(1040)	75(515)	30(205)	35
TP316L	Solution	1900(1040)	70(485)	25(170)	35

Equivalent Grades of ASTM A270 Sanitary Tubing

GRADE	UNS NO	DIN/ WERKSTOFF
Stainless Steel Sanitary Tube 304	S30400	1.4301
304L	S30403	1.4306
Stainless Steel Sanitary Tube 316	S31600	1.4436
316L	S31603	1.4404

Company Profile

Zhongzheng Stainless Steel Co., Ltd.

Zhongzheng Stainless Steel Co., Ltd. is a China-based manufacturer specializing in R&D, production, and distribution of stainless steel products. Established in the early 2000s, it serves industries including construction, machinery, food/medical equipment, and energy with precision tubes, sheets, profiles, and custom components.

Contact Us

Zhongzheng Stainless Steel Co., Ltd.: Contact nameLaijing Bu
Chat Now; AddressRoom 104-07, Building 5, Jinghu Technology Park Huanajinghu Garden, Donglihu Subdistrict Dongli District,

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Galvanized steel pipe	Steel coil sheet and plate	Galvanized Steel Sheet	Industrial Pipeline Series
Industrial sheets and rolls	Industrial Valve Series	Industrial Accessories Series	Sanitary valve series
Hygienic grade piping series	Hygienic grade accessory series	Sanitary grade panels and rolls	Special Materials
Galvanized steel	Sanitary Pipeline Series

ASTM A312 A789 A269 304 304L 316L 2205 2507 Round Duplex Pipes Stainless Steel Seamless Tubes

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