ASTM A312 TP304 Stainless steel seamless pipe is an austenitic alloy grade designed with a superior composition of nickel and chromium. Ο ASTM A312 TP304 alloy has excellent resistance against corrosive and oxidative media across stress-induced environments. The versatile grade of alloys has outstanding mechanical properties. They have a minimum tensile strength of 75ksi with a minimum yield strength of 30Ksi. Ο ASTM A312 Grade TP304 Seamless Pipe can be processed via the hot or cold rolling process. These pipes can be availed in thickness between 0.8mm up to 12mm and can be availed in different sizes and dimensions to meet project requirements.

The components in this grade are produced in seamless, συγκολλημένος, and ERW configurations. Each of these modules has its own set of features allowing them to be used in different applications. Ο ASME SA 312 TP 304 Seamless Pipe is produced via an extrusion process wherein hot steel billets are passed through the metal. ASTM A312 TP304 Stainless steel seamless pipe allows the material the capability to work in high temperatures and pressures. More over these pipes are slightly expensive as compared to welded pipes.

Equivalent of ASTM A312 TP304 Seamless Pipe

Equivalent GRADE

GRADE	ΜΑΣ	ΣΕ	ΑΥΤΟΣ	AFNOR	BS	WERKSTOFF NR.	GOST	SS
UNDER	USA	EUROPE	JAPAN	RUSSIAN	BRITISH	GERMAN	RUSSIAN	SWEDISH
ASTM A312 TP 304	S30400	X5CrNi18-10	SUS 304	Z7CN18‐09	304S31	1.4301	08Х18Н10	2332

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ASTM A312 TP304 stainless steel chemical composition

Chemical composition

Grade	ντο	Mn	Π	μικρό	Και	Σε	Cr	Fe
TP304	0.08	2.00	0.045	0.030	1.0	8-11	18-20	Bal.

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ASTM A312 TP304 stainless steel mechanical properties

Mechanical properties chart

	Αντοχή σε εφελκυσμό(Mpa) MaxYield point(Mpa) Μέγ		Επιμήκυνση(%)		Σκληρότητα (HRB) Μέγ
TP304	515	205		35	92

SS 304 Seamless Pipes Physical Properties

Physical Properties Chart

rade	Πυκνότητα (kg/m3)	Specific Heat 0-1000C (J/kg.K)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (m/m/0C)			Thermal Conductivity (W/m.K)		Electrical Resistivity (n.m)
				0-100°C	0-315°C	0-538°C	at 100°C	at 500°C
304	8000	500	193	17.2	17.8	18.4	16.2	21.5	720

ASTM A312 TP304 Seamless Pipe Schedule Chart

Schedule Change to inch/mm Chart

Nominal Pipe Size (NPS)	STD SCH 40S	SCH 0S	SCH 120	XS SCH 80S	XXS	Outside Diameter (mm)	SCH 160
1/8″	1.073 0.037			2.041 0.048		10.029
1/4″	2.024 0.064	1.065 0.048		3.002 0.081		13.072
3/8″	2.031 0.086	1.065 0.064		3.020 1.012		17.015
1/2″	2.077 1.029	2.011 1.001		3.073 1.064	7.047 2.065	21.034	4.076 1.098
3/4″	2.087 1.071	2.011 1.030		3.091 2.023	7.082 3.069	26.067	5.056 2.094
1″	3.038 2.054	2.077 2.012		4.055 3.028	9.009 5.075	33.040	6.035 4.030
1 1/4″	3.056 3.043	2.077 2.073		4.085 3.053	9.070 7.088	42.016	6.035 5.069
1 1/2″	3.068 3.011	2.077 3.015		5.008 5.049	10.016 9.069	48.026	7.014 7.034
2″	3.091 5.052	2.077 3.098		5.054 7.059	11.007 13.065	60.033	8.074 11.028
2 1/2″	5.016 8.076	3.005 5.034		7.001 11.058		73.003	9.053 15.014
3″	5.049 11.045	3.005 6.054		7.062 15.050	15.024 28.009	88.090	11.013 21.065
3 1/2″	5.074 13.077	3.005 7.052		8.008 18.090		101.060
4″	6.002 16.031	3.005 8.048	11.013 28.032	8.056 22.065	17.012 41.063	114.030	13.049 34.002
5″	6.055 22.010	3.040 11.074		9.052 31.041		141.060	15.088 49.083
6″	7.011 28.068	3.040 14.004	14.027 54.020	10.097 43.019	21.095 80.036	168.026	18.026 68.056
8″	8.018 43.016	3.076 20.025	23.001 112.090	12.070 65.059		219.008	18.026 90.044
10″	9.027 61.020	4.019 28.020		12.070 81.055		273.005	28.058 174.082
12″	9.053 74.092	4.057 36.053	323.085	12.070 97.046

ASME SA 312 TP 304 Pipes Weight Chart

PIPE SIZE	OD IN INCHES	A.S.A. Pipe Schedules
		5μικρό	5	10μικρό	10	40μικρό & Std.	40	60	80μικρό & E.H.	80	120	160	DBL E.H.
1/8	.405		.035.1383	.049.1863	.049.1863	.068.2447	068.2447		0.95.3145	0.95.3145
1/4	.540		.049.2570	.065.3297	.065.3297	.088.4248	088.4248		.119.5351	.119.5351
3/8	.675		.049.3276	.065.4235	.065.4235	.091.5676	.091.5676		.126.7338	.126.7338
1/2	.840	.065.5383	.065.5383	.083.6710	.083.6710	.109.8510	.109.8510		.1471.088	.1471.088		.1871.304	.2941.714
3/4	1.050	.065.6838	.065.6838	.083.8572	.083.8572	.1131.131	.1131.131		.1541.474	.1541.474		.2181.937	.3082.441
1	1.315	.065.8678	.065.8678	.1091.404	.1091.404	.1331.679	.1331.679		.1792.172	.1792.172		.2502.844	.3583.659
1-1/4	1.660	.0651.107	.0651.107	.1091.806	.1091.806	.1402.273	.1402.273		.1912.997	.1912.997		.2503.765	.3825.214
1-1/2	1.900	.0651.274	.0651.274	.1092.085	.1092.085	.1452.718	.1452.718		.2003.631	.2003.631		.2814.859	.4006.408
2	2.375	.0651.604	.0651.604	.1092.638	.1092.638	.1543.653	.1543.653		.2185.022	.2185.022		.3437.444	.4369.029
2-1/2	2.875	.0832.475	.0832.475	.1203.531	.1203.531	.2035.793	.2035.793		.2767.661	.2767.661		.37510.01	.55213.70
3	3.500	.0833.029	.0833.029	.1204.332	.1204.332	.2167.576	.2167.576		.30010.25	.30010.25		.43714.32	.60018.58
3-1/2	4.000	.0833.472	.0833.472	.1204.973	.1204.973	.2269.109	.2269.109		.31812.51	.31812.51			.63622.85
4	4.500	.0833.915	.0833.915	.1205.613	.1205.613	.23710.79	.23710.79	.28112.66	.33714.98	.33714.98	.43719.01	.53122.51	.67427.54
4-1/2	5.000					.24712.53			.35517.61				.71032.53
5	5.563	.1096.349	.1096.349	.1347.770	.1347.770	.25814.62	.25814.62		.37520.78	.37520.78	.50027.04	.62532.96	.75038.55
6	6.625	.1097.585	.1097.585	.1349.290	.1349.290	.28018.97	.28018.97		.43228.57	.43228.57	.56236.39	.71845.30	.86453.16
7	7.625					.30123.57			.50038.05				.87563.08
Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds

Mostly TP304 stainless steel pipe pressure rating

Stainless Steel Pipes – Αξιολογήσεις πίεσης

Pressure ratings for standard seamless A312-TP304 stainless steel pipes – temperatures 100°F to 750°F

Ratings for standard seamless stainless steel pipeμικρό, temperatures from 100°F to 750°F. All ratings in psig based on ANSI/ASME B 31.1.

Pressure Rating (psig)

Μέγεθος σωλήνα (inches)	Pipe Schedule	Temperature (°F)
		100	200	300	400	500	600	650	700	750
1″	40	3048	2629	2362	2171	2019	1924	1867	1824	1810
1″	80	4213	3634	3265	3002	2791	2659	2580	2528	2501
1″	160	6140	5296	4759	4375	4068	3876	3761	3684	3646
1.5″	40	2257	1947	1750	1608	1496	1425	1383	1354	1340
1.5″	80	3182	2744	2466	2267	2108	2009	1949	1909	1889
1.5″	160	4619	3984	3580	3291	3060	2916	2829	2772	2743
2″	40	1902	1640	1474	1355	1260	1201	1165	1141	1129
2″	80	2747	2369	2129	1957	1820	1734	1682	1648	1631
2″	160	4499	3880	3486	3205	2980	2840	2755	2699	2671
3″	40	1806	1558	1400	1287	1196	1140	1106	1084	1072
3″	80	2553	2202	1979	1819	1691	1612	1564	1532	1516
3″	160	3840	3312	2976	2736	2544	2424	2352	2304	2280
4″	40	1531	1321	1187	1091	1014	967	938	919	909
4″	80	2213	1909	1715	1577	1466	1397	1355	1328	1314
4″	160	3601	3106	2791	2566	2386	2273	2206	2161	2138
5″	40	1342	1158	1040	956	889	847	822	805	797
5″	80	1981	1709	1535	1411	1312	1250	1213	1189	1176
5″	160	3414	2945	2646	2433	2262	2155	2091	2049	2027
6″	40	1219	1052	945	869	808	770	747	732	724
6″	80	1913	1650	1483	1363	1267	1208	1172	1148	1136
6″	160	3289	2836	2549	2343	2179	2076	2014	1973	1953
8″	40	1073	926	832	765	711	678	657	644	637
8″	80	1692	1459	1311	1205	1121	1068	1036	1015	1005
8″	160	3175	2738	2460	2262	2103	2004	1944	1905	1885
10″	40	974	840	755	694	945	615	596	584	578
10″	80	1609	1388	1247	1147	1066	1016	986	966	956
10″	160	3147	2714	2439	2242	2085	1986	1927	1880	1868

304 stainless steel Pipe Outside Diameter Tolerance

NPS	ASTM A312 OD Tolerance
	+		–
	ίντσα	mm	ίντσα	mm
1/8~ 1 1 /2	1/64(0.015)	0.4	1/32(0.031)	0.8
> 1 1 /2~ 4	1/32(0.031)	0.8	1/32(0.031)	0.8
> 4~ 8	1/16(0.062)	1.6	1/32(0.031)	0.8
> 8~ 18	3/32(0.093)	2.4	1/32(0.031)	0.8
> 18~ 26	1/8(0.125)	3.2	1/32(0.031)	0.8
> 26~ 34	5/32(0.156)	4	1/32(0.031)	0.8
> 34~ 48	3/16(0.187)	4.8	1/32(0.031)	0.8

Astm A312 Tp304 Pipe Processing

ASTM A312 TP304 Stainless steel seamless pipe manufacture Processing
Structural Cutting	Products cut include tube, tubing, Square tubes, Rectangular tubes, round tubes Thickness range is 1/8″NB TO 30″NB diameter
Tubular Cutting	Products cut include Ornamental Tube, Tubing and Hollow Section. Thickness range is 1/8″NB TO 30″NB diameter
Production Cutting	can provide production cutting for product diameters up to 4″. We utilize Amada Production Equipment to achieve these precision cuts with tight tolerances.
Structural Polishing	Products polished included all tubular products, with OD & ID polishing available

Κατεργασία με θερμοκρασία

Stainless steel pipes made of austenitic stainless steel ASTM A312 TP304 or TP304L shall be solution annealed. ASTM A312 TP304 Stainless steel seamless pipe During annealing, the pipes shall be heated to the temperature no less than 1900°F [1040°C] and soak at the temperature for a period long enough so that all chromium carbides are dissolved. Since the chromium carbide dissolves slowly, the highest practical temperature consistent with limited grain growth should be selected. This temperature is in the vicinity of 1095° [2000°F]. Complete dissolution of chromium carbides reduces precipitation of intergranular carbides hence improves the resistance to intergranular corrosion. Subsequent cooling (quenching) from the annealing temperature must be fast, thus ensuring that dissolved carbides remain in solution.

SA 312 Γρ 304 Seamless Pipe Applications

Φαρμακευτικά

Chemicals

Food Processing

Oil and Gas Processing

Energy industries

Πολτός και Χαρτί

Textile Machinery

Power Plants

Construction

Automotive Industry

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