High quality stainless steel pipe fittings supplier Zizi provides SS 304 and SS 316 pipe elbow, tee, reducer, cap, coupling, nipple, union and plug in any sizes.
Pipe cap is used to stop the flow by block off the end. It is available in buttweld end, socket weld end and threaded end. The latter two are forged fittings, and buttweld cap is wrought. BW caps have large dimension range than forged type, it ends is further divided into plain and beveled. And according to the different technique, it also has seamless cap and welded cap.
Standard | ASME/ANSI B36.19, B16.9 |
Size | 1/2" - 60" |
Thickness | Sch 10S, 20S, STD, 40S, 80S, 100, 120, 140, 160, XXS |
End Type | BE and PE |
Stainless Steel | ASTM A403 WP304/304L, WP304H, WP316/316L, WP310, WP317, WP321 |
Duplex Steel | ASTM A815 UNS S 31803, S 32205, S 32550, S 32750, S 32760 |
Carbon Steel | ASTM A234 WPB, A860 WPHY42, 52, 60, 65, 70 |
Low Temp Carbon Steel | ASTM A420 WPL3, WPL6, WPL9 |
Alloy Steel | ASTM A234 WP1, WP5, WP9, WP11, WP12, WP22, WP91 |
No matter among buttweld pipe fittings nor forged pipe fittings, the most popular and extensive used stainless steel is grade 316 and grade 304. Both are Austenitic stainless steel with excellent corrosion resistance and high strength. However, the specification for forged fittings is ASTM A182, while for buttweld fittings is ASTM A403.
Compared their chemical composition, we konw ASTM A403 WP316 contains Mo while A403 WP304 not has. This is an element that added to help resist corrosion to chlorides, so SS316 corrosion resistant better.
Chemical Composition of Stainless Steel 316
C | Mn | P | S | Si | Ni | Cr | Mo |
0.035 | 2 | 0.045 | 0.03 | 1 | 10-14 | 16-18 | 2-3 |
Mechanical Properties of Stainless Steel 316
Tensile Strength | Yield Strength | Elongation |
520 (Mpa) | 205 (Mpa) | 30 (%) |
Chemical Composition of Stainless Steel 304
Grade | C | Mn | P | S | Si | Ni | Mo | Cr |
SS 304 | 0.08 | 2 | 0.045 | 0.03 | 1.0 | 8-11 | - | 18-20 |
Mechanical Properties of Stainless Steel 304
Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) |
SS 304 | 515 | 205 | 20 |
Heat Treatment
Both SS316 and SS304 are treated by Pickling and Solution.
The dimension of pipe cap is very extensive and diverse, so we bsed on our manufacture experience, we give you commonly used pipe cap's weight within 24 inch.
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