Frequently Asked Questions about Pipe Fittings
1. What types of pipe fittings does Xenith Steel manufacture?
Xenith Steel manufactures four pipe fitting types:
(1) Elbows: 45, 90, 180-degree in LR and SR configurations. Seamless 1/2-24in, welded 26-96in.
(2) Tees: Equal and reducing for branch connections. Seamless 1/2-24in, welded 26-72in.
(3) Reducers: Concentric and eccentric for diameter changes. 1/2-24in.
(4) Flanges: Weld neck, slip-on, blind, socket weld, threaded, lap joint. 1/2-120in, rating 150-2500.
2. What materials are available for pipe fittings?
Xenith Steel offers five material categories:
(1) Carbon Steel: ASTM A234 WPB, WPC, A420 WPL6 for general service.
(2) Alloy Steel: ASTM A234 WP5, WP9, WP11, WP22, WP91 for high-temperature service.
(3) Stainless Steel: ASTM A403 WP304, WP316, WP321, WP347, WP310S for corrosion resistance.
(4) Duplex Steel: ASTM A815 S32205, S32750, S32760 for chloride environments.
(5) Nickel Alloys: Inconel 625, 718, Monel 400, Hastelloy C276 for extreme conditions.
3. What is the difference between butt-weld and forged fittings?
Two fitting types differ in manufacturing and application:
(1) Butt-Weld Fittings: Manufactured per ASME B16.9 from pipe or plate. Size range 1/2-96in. Used for permanent welded connections in piping systems. Smooth bore for minimal flow restriction.
(2) Forged Fittings: Manufactured per ASME B16.11 from forged billets. Size range 1/8-4in. Used for socket-weld or threaded connections. Higher pressure rating for small-bore piping.
4. What standards govern pipe fitting dimensions and tolerances?
Xenith Steel follows five fitting standards:
(1) ASME B16.9: Factory-made wrought butt-welding fittings for dimensions and tolerances.
(2) ASME B16.11: Forged steel fittings, socket-welding and threaded.
(3) MSS-SP-43: Wrought stainless steel butt-welding fittings.
(4) DIN 2605/2615/2616: German standards for carbon and alloy steel fittings.
(5) EN 10253: European standard for butt-welding pipe fittings.
5. What manufacturing processes does Xenith Steel use for fittings?
Xenith Steel uses four manufacturing processes:
(1) Hot Forming: Heating and pressing plate or pipe into elbow, tee, or reducer shapes.
(2) Cold Forming: Room temperature pressing for smaller fittings with tight tolerances.
(3) Forging: Multi-station forging presses for socket-weld and threaded fittings.
(4) CNC Machining: Precision end preparation, beveling, and dimensional finishing for all fitting types.
6. What quality tests are performed on pipe fittings?
Xenith Steel performs six quality tests:
(1) Chemical analysis for grade verification via PMI spectroscopy.
(2) Mechanical testing including tensile, hardness, and impact tests.
(3) Dimensional inspection for OD, WT, bevel angle, and center-to-end measurements.
(4) Non-destructive testing (UT/RT/MT/PT) for defect detection.
(5) Hydrostatic pressure testing for forged fittings.
(6) Surface inspection for cracks, laps, and finish quality.
