ASTM B622 · ASME SB-622 · ASTM B829 · EN 10204 3.1
Hastelloy seamless tubes to ASTM B622 come off the draw benches of Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd. at Ban Bueng, Chonburi, Thailand, drawn for acid and chloride duty that leaves an austenitic grade pitted or cracked. Order review and certificate release sit with the Bang Phli, Samut Prakan office. The C grades cover UNS N10276 seamless tube and seamless WNR 2.4602 tube. For hot reducing acids the range turns to seamless 2.4617 tube.
Hastelloy seamless tubeASTM B622 · ASME SB-622
Every tube tested · hydrostatic or electric NDT
Every grade below is drawn inside one envelope, so a bundle list can mix them without changing the sizes available. A tube line carries no nominal size: it gives the finished outside diameter, the wall thickness and which of the two wall bases the order works to.
One product standard sits behind the whole range: ASTM B622, Standard Specification for Seamless Nickel and Nickel-Cobalt Alloy Pipe and Tube, with ASME SB-622 as the reference used on code work. The specification names each alloy by its UNS number only and prints no grade name beside it, so Alloy C22 and Alloy B3 are commercial labels, not ASTM designations. Clause 5.1.2.1 fixes how a tube is ordered, while ASTM B829 supplies the manufacturing requirements, permitted dimensional variations, lot rules, length tolerances and marking that B622 adopts. A requirement written in nominal sizes and schedules is quoted as Hastelloy seamless pipes instead.
Two tests represent the lot and one proves the piece. Chemistry is analyzed once for each lot and one tension test is pulled from it, a lot being material of one heat, one size and one condition, and a failed tension specimen is answered by two further specimens that must both pass. Each ASTM B622 seamless nickel alloy tube is then proved singly, either by a hydrostatic test or by nondestructive electric examination. Those figures reach you on the EN 10204 3.1 (3.2 on request) certificate, which travels with raw material certificates, a positive material identification record per tube, the heat treatment charts, and records of the size and surface checks.
Three figures finish a tube line under ASTM B622: the outside diameter, the wall thickness as a minimum or an average, and the length. Nothing else is needed, and nothing else is read, which is why a tube drawing can specify a finished diameter that answers to no nominal size at all. Pipe is handled the other way round, by nominal size with a schedule setting the wall, and the two bases meet different design habits rather than different mills: the same benches draw both.
The wall basis is the choice that matters most on a bundle. Ordered to minimum wall, the whole permitted variation is added above the figure stated, so the thinnest point of the finished tube is still the wall the calculation used. Ordered to average wall, that variation falls on both sides of the number, which suits a datasheet written to a nominal thickness. Grade does not shift the envelope either: seamless WNR 2.4819 tube and seamless WNR 2.4617 tube are drawn over the same diameters and walls.
Chromium is the dividing line in this family. Alloy C276, Alloy C22 and Alloy C4 hold enough of it to work in oxidizing and mixed-acid streams, while the two B grades, Alloy B2 and Alloy B3, carry almost none of it and take the reducing acids instead. Each grade page below sets out the chemistry, the strength minimums, the tolerance bands and the test detail for that one alloy.
Alloy C276 anchors the C group, a nickel-molybdenum-chromium alloy whose tungsten addition helps it hold wet chlorine, hypochlorite and ferric and cupric chloride streams. Harsh chemical processing and waste treatment bundles are where it sits. Tolerances, chemistry and finishes for UNS N10276 seamless tube are on the Alloy C276 seamless tubes page.
Chromium above the level in the reference grade is what sets Alloy C22 apart, which is why it goes into nitration service, chlorine dioxide circuits and chromic acid streams where the duty swings between oxidizing and reducing. Sizes and chemistry for seamless WNR 2.4602 tube are on Alloy C22 seamless tubes.
Alloy C4 keeps its structure through long hot exposure and resists grain-boundary precipitation, which suits a bundle that goes into service as welded or sits hot for weeks together. Condenser, reboiler and evaporator tube is its usual home. See Alloy C4 seamless tubes for sizes and grade data.
With effectively no chromium in it, Alloy B2 is a nickel-molybdenum alloy for pure reducing acids: hydrochloric at any concentration, and sulfuric, hydrofluoric, acetic and phosphoric besides. Heat transfer units on those duties are typical. Ordering detail for UNS N10665 seamless tube and seamless 2.4617 tube is on Alloy B2 seamless tubes.
Alloy B3 gives the same reducing acid resistance as Alloy B2 with better structural stability through heating and cooling, so a cycled or frequently restarted bundle is its case. Reboiler and overhead condenser tube is where it lands most often. Grade data is on Alloy B3 seamless tubes.
Diameters open at 6 mm and reach 457 mm, walls run from 1 mm to 65 mm, and a tube can be cut as long as 22 m, which is what lets a single piece run the whole length of a long exchanger shell.
The cut-length allowance is keyed on diameter rather than on grade, so a UNS N10665 seamless tube and a C276 tube of the same size are held to the same figures: up to 7.3 m, plus 3.2 mm and nothing under below 50.8 mm outside diameter, and plus 4.8 mm from 50.8 mm upward. Beyond 7.3 m the over-tolerance grows by a further 3.2 mm with every additional 3 m or fraction, up to 12.7 mm in all. Diameter and wall limits are taken from the cold-worked bands that ASTM B829 sets out, and the applicable band is named on the quotation.
A solid billet is hot extruded or rotary pierced into a hollow shell. Cold drawing or cold pilgering then brings it down to the ordered diameter and wall, and that is the step giving the bore its smooth surface and holding the diameter steady along the length.
Every seamless 2.4602 tube and every B grade tube next goes through solution annealing, and B622 calls for delivery in the solution annealed and descaled condition, adding that descaling becomes unnecessary once the annealing atmosphere is controlled. Pickling, straightening, cutting and testing close the sequence, and each tube leaves with plain ends, cut and deburred. Walls are quoted in millimeters against the diameter table, and a requirement written in inches is converted and confirmed on the quotation.
Heat transfer is the center of gravity for this family, where a thin wall and an accurate bore do the work. The seven duties below cover most of the bundle and small-bore work we quote.
Shell-and-tube exchangers, condensers, reboilers and evaporators on acid and chloride duty are the core work for this family, and seamless WNR 2.4819 tube is what most bundles are built from.
Chlorination systems, acid scrubbers, reactor and vessel internals, catalyst regeneration circuits and solvent recovery tubing put mixed acids through the bore, duty that seamless 2.4819 tube and the other C grades carry.
Hydrochloric and sulfuric acid concentration, recovery and reboiler circuits run strongly reducing media, which is the case for seamless 2.4617 tube and for the B3 grade alongside it.
Bleaching stages running chlorine dioxide, hypochlorite and wet chlorine gas, together with digester components and acid transfer tubing, are held by seamless 2.4602 tube and by the C4 grade.
Active pharmaceutical ingredient synthesis, high-purity dosing circuits and solvent recovery tubing ask for a bore that will not contaminate the product through corrosion, and UNS N06022 seamless tube is the usual answer.
Shipboard exhaust and incineration circuits, flue gas desulfurization scrubber tubing, wastewater treatment and chlorination plant sit in chloride-laden service, and UNS N10276 seamless tube is the grade usually written against them.
Sensor protection tubes and exhaust-component test pieces in automotive work are drawn at the small end of the range, from 6 mm outside diameter upward, and seamless WNR 2.4602 tube covers that duty.
How each consignment of Hastelloy seamless tube is bundled, capped, marked, documented and shipped from the mill.
Packing
Tubes sorted by grade, diameter and heat, banded into hexagonal bundles and crated in timber for sea freight. Plastic plugs are pushed into both ends of every tube, so the descaled bore reaches the tubesheet as it left the works.
Marking
Documents
Tests
One chemical analysis and one tension test per lot, a lot being one heat, one size and one condition. Every tube is then proved singly by a hydrostatic test or by nondestructive electric examination, and carries its own positive material identification record.
Trade terms
FOB, CIF or CFR, confirmed on the order acknowledgement.
Reach
Truck delivery anywhere in Thailand and container export to Singapore, Malaysia, Vietnam, Indonesia, the Philippines and India.
Billets are extruded or pierced, drawn, annealed, pickled, straightened and tested at 154 Moo.1 Map Phai, Ban Bueng, Chonburi 20170, Thailand. Drawing checks, quotations and the release of test paperwork happen at 89/18 Moo.15 Enterprize Park, Bangna-Trad Road, Bang Kaeo, Bang Phli, Samut Prakan 10540, Thailand. Every ASME SB-622 seamless tube carries its heat number out of the works, which is what links a bundle standing on site back to its tested lot. An inquiry gets a reply naming the sizes already on the floor and those that need a production run.
Three figures: outside diameter, the wall with its basis, and the length. B622 clause 5.1.2.1 sets that out for tube, which is why no nominal size or schedule appears on a tube line. Add the grade and the tube count per item and the inquiry is complete.
Minimum wall suits a line whose calculated thickness is a floor: every permitted variation is added on top, so the thinnest point still meets the figure you gave. Average wall suits a nominal thickness that may run either side of the number. Say which you mean on each line, because the two quote differently.
Never under the ordered figure, and the over-allowance is keyed on diameter, with a wider band once a length passes 7.3 m and a ceiling beyond which it stops growing. The exact figures for your diameter appear on the quotation, alongside the band that applies to the cut lengths you ask for.
Five: Alloy C276, Alloy C22 and Alloy C4 in the chromium-bearing C group, and Alloy B2 and Alloy B3 in the nickel-molybdenum B group. A drawing may call any of them out by number instead, so seamless WNR 2.4617 tube and seamless 2.4819 tube quote without a query.
Round, in straight lengths, with plain ends cut and deburred, which is what B622 provides for. ASTM B829 also requires delivered material to be straight enough to handle, with no bends or kinks. Walls are stated in millimeters rather than as a gauge number, and every tube is straightened, cut to length and capped before packing.
Yes. Each tube is solution annealed and then descaled, and B622 treats descaling as unnecessary when the annealing atmosphere is controlled. Cold drawing or pilgering leaves the internal surface smooth and the diameter consistent, and both ends are capped before packing.
The EN 10204 3.1 (3.2 on request) certificate, raw material certificates, a positive material identification record per tube, the annealing charts and the size and surface measurement records. A third-party inspection report and an independent laboratory report are added when the order asks for them.
By the heat number marked on it. Chemistry and tensile results represent the lot, meaning one heat at one size and condition, so the mark on a UNS N06022 seamless tube points to the right row on the certificate. The pressure or electric test result belongs to that tube alone.
Request a Quote for Hastelloy Seamless Tubes
or email sales@thaida.co.th
