ASTM A312 Tp348 Seamless and Welded Austenitic Stainless Steel Pipe

• Customization: Available
• After-sales Service: Technical/Sample/Quality
• Type: Seamless/Welded
• Model NO.: TP348
• Material: Carbon/Alloy/Stainless
• Surface Treatment: Black&Varnish Coating&3lpe&PE
• Usage: Boiler Pipe, Food/Beverage/Dairy Products, Chemical Industry
• Section Shape: Round
• Materials: Stainless
• Standard: AISI/SAE/ASTM/DIN/BS/En
• Transport Package: as Required
• Specification: 10-850mm
• Origin: China
• Production Capacity: 30000tons/Year

Product Description

ASTM A312 Seamless and Welded Austenitic Stainless Steel Pipe

ASTM A312 / A312M seamless, straight-seam welded, and cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service. Several grades of steel shall conform to the required chemical composition for carbon, manganese, phosphorus, sulfur, silicon, chromium, nickel, molybdenum, titanium, columbium, tantalum, nitrogen, vanadium, copper, cerium, boron, aluminum, and others. All pipes shall be furnished in the heat-treated condition in accordance with the required heat treating temperature and cooling/testing requirements. Tensile properties of the material shall conform to the prescribed tensile strength and yield strength. The steel pipe shall undergo mechanical tests such as transverse or longitudinal tension test and flattening test. Grain size determination and weld decay tests shall be performed. Each pipe shall also be subjected to the nondestructive electric test or the hydrostatic test.
 

ASTM A312 Stainless Tube Manufacturer

We are professional ASTM A312 stainless tube manufacture & supplier, having capability to produce wide range size steel tube for heat exchanger system, manufacturing process starts from extrusion of billet, by cold rolling and cold drawn methods to control size and tolerance, heat treatment will be finished after cold working to achieve original steel properties, which improve high temperature resistance and corrosion resistance, then tubes should be under pickling passivation condition.
 

ASTM A312 Stainless Tube Chemical Composition % Max

Grade	C	Mn	P	S	Si	Cr	Ni	Mo	Nb	Ti
TP304	0.08	2	0.045	0.03	1	18.0-20.0	8.0-11.0	…	… .	…
TP304H	0.04-0.10	2	0.045	0.03	1	18.0-20.0	8.0-11.0	…	…	…
TP304L	0.035 D	2	0.045	0.03	1	18.0-20.0	8.0-13.0	…	…	…
TP310S	0.08	2	0.045	0.03	1	24.0-26.0	19.0-22.0	0.75
TP316	0.08	2	0.045	0.03	1	16.0-18.0	11.0-14.0	2.00-3.00	…	…
TP316L	0.035	2	0.045	0.03	1	16.0-18.0	10.0-14.0	2.00-3.00	…	…
TP316H	0.04-0.10	2	0.045	0.03	1	16.0-18.0	11.0-14.0	2.00-3.00	…	…
TP316Ti	0.08	2	0.045	0.03	0.75	16.0-18.0	10.0-14.0	2.00-3.00	…	5x(C+N)-0.70
TP321	0.08	2	0.045	0.03	1	17.0-19.0	9.0-12.0	…	…	5C-0.70
TP321H	0.04-0.10	2	0.045	0.03	1	17.0-19.0	9.0-12.0	…	…	4C-0.60
TP347	0.08	2	0.045	0.03	1	17.0-19.0	9.0-13.0		10xC-1.00	…
TP347H	0.04-0.10	2	0.045	0.03	1	17.0-19.0	9.0-13.0	…	8xC-1.00	…

 

ASTM A312 Stainless Tube Mechanical Properties

Material	Heat Treatment	Temperure Min.  F(C)	Tensile Strength Ksi (MPa), Min.	Yield Strength Ksi (MPa), Min.	Elongation %, Min
TP304	Solution	1900 (1040)	75(515)	30(205)	35
TP304L	Solution	1900 (1040)	70(485)	25(170)	35
TP304H	Solution	1900 (1040)	75(515)	30(205)	35
TP310S	Solution	1900 (1040)	75(515)	30(205)	35
TP316	Solution	1900(1040)	75(515)	30(205)	35
TP316L	Solution	1900(1040)	70(485)	25(170)	35
TP316H	Solution	1900(1040)	75(515)	30(205)	35
TP316Ti	Solution	1900(1040)	75(515)	30(205)	35
TP321	Solution	1900(1040)	75(515)	30(205)	35
TP321H	Solution	Cold: 2000(1100) Hot: 1925(1050)	75(515)	30(205)	35
TP347	Solution	1900(1040)	75(515)	30(205)	35
TP347H	Solution	Cold: 2000(1100) Hot: 1925(1050)	75(515)	30(205)

 

ASTM A312 Stainless Tube Lengths

1. Unless otherwise agreed upon,all sizes from NPS 1/8 to and including NPS 8 are available in a length up to 24 ft with the permitted range of 15 to 24 ft.Short lengths are acceptable and the number and minimum length shall be agreed upon between the manufacturer and the purchaser.
2. If definite cut lengths are desired,the lengths required shall be specified in the order.No pipe shall be under the specified length and no pipe shall be more than /4 in.[6 mm] over the specified length.
3. No jointers are permitted unless otherwise specified.

 

ASTM A312 Testing Requirement

Each tube shall be subjected to the nondestructive electric test or hydrostatic test, Manufacturer Material Test Certification as per EN 10204 3.1 should be provided.

1. Tensile property, Elogation
2. Hardness testing, Brinell, Rockwell, Vickers hardness
3. Flattening testing
4. Flaring testing
5. Hydrostatic or Nondestructive test
6. Intergranular Corrosion Test - ASTM A262/E (option)

A312 Tubes Marking
In addition to the marking specified in Specification A999/A999M,the marking shall include the NPS(nominal pipe size)or outside diameter and schedule number or average wall thickness,heat number,and NH when hydrotesting is not performed and ET when eddy-current testing is performed or UT when ultrasonic testing is performed.The marking shall also include the manufacturer's private identifying mark,the marking requirement,if applicable,and whether
seamless(SML),welded(WLD),or heavily cold-worked (HCW).For Grades TP304H, TP316H, TP321H, TP347H, TP348H, and S30815,the marking shall also include the heat number and heat-treatment lot identification.If specified in the purchase order,the marking for pipe larger than NPS 4 shall include the weight.

A312 Tubes Packing
A312 Seamless Tubes is sleeved into plastic bag individually, pieces wrapped with water-proof material, bundled with nylon rope. Clear labels are tagged on the outside of the package for easy identification of the quantity and product I.D. Great care is taken during operation and transportation.
A312 Steel Seamless Tubes packing will be according to international standard in bundles strapped by strips then into containers to avoid any damage. Delivery: Within 10-25 days or asap if we have enough stock