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#Stainless steel pipe code#

Outside diameter (OD), wall thickness and length are three basic parameters in the process of manufacture and distribution for stainless steel tube & pipe, and these parameters have been standardized. In the production process, because the actual size is difficult to meet the nominal pipe size requirement, that is, it is often larger or smaller than the nominal size, so the standard stipulates that there is a difference between the actual size and the nominal size of the stainless steel pipe.Ī positive difference is called a positive deviation, and a negative difference is called a negative deviation. Popular grades: 1.4306 (304L), 1.4404 (316L)Īustenitic ferritic stainless steel (duplex stainless steel) Heat exchanger tubes are supplied in Standard Wire Gauge (SWG) or Birmingham Wire Gauge (BWG) Size range 6.35mm - 76.2mm OD x 0.91mm – 3.25mm wall thickness

ASTM A556M-88/ASME SA556 heater tubes 1.

We supply both seamless and welded tubes which meet the requirements for shell and tube heat exchangers: In order to meet the demand for rapid delivery, we have a strip stock with both standard and special grades of steel in the most common thicknesses. Characteristic requirements are: bead worked weld, fixed lengths and extensive testing. Heat exchanger Tubes are used in all types of process industries. The 321 and 347 alloys have maximum use temperatures of 1500☏ (816☌)

#Stainless steel pipe code#

347H in higher elevated temperature allowable stresses for these stabilized alloys for ASME Boiler and Pressure Vessel Code applications.321H advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500☏ (427℃ to 816☌).304H the carbon content is controlled to a range of 0.04-0.08 to provide improved high temperature strength to parts exposed to temperatures above 800☏ (427℃).Maximum Recommended Service Temperature Continuous 1100℃ /Intermittent 980℃ 08 to reduce carbon precipitation during welding.

309S High corrosion-resistant, chromium nickel grade with carbon limited to.Due to its relatively high chromium and nickel content it is superior in most environments to 304 or 309 stainless. 310S Stainless steel is a combination of good strength and corrosion resistance in temperature up to 2100oF (1149℃).These stainless steel have the good heat-resisting performance, is suitable in the steam environment or 550℃ and the above temperature. This grade of stainless steel is suitable for the manufacture of vehicle or other motor exhausts.