Views: 0 Author: Site Editor Publish Time: 2026-10-20 Origin: Site
As a professional nickel alloy manufacturer, we supply a full range of nickel based coiled tubing covering Inconel, Incoloy, Hastelloy and Monel grades for chemical processing facilities. Available in both seamless and welded construction, these long continuous coils serve heat exchange units, reaction vessel internal coils, sampling lines and process transfer piping where ordinary stainless steel cannot hold up to harsh chemical conditions.
One major practical advantage in chemical plants is its long continuous length. Unlike standard straight pipe sections that require dozens of field weld joints, nickel alloy coiled tubing minimises connection points. Fewer joints greatly lower leakage risks caused by crevice corrosion at weld seams, a very common failure mode inside chemical workshops. It also cuts down installation work and shortens on site construction cycles for skid mounted process equipment.
Material wise, these coils deliver strong resistance against complex chemical media.They stand up to mixed acids, alkaline fluids, chloride rich brine, sulphide containing process streams and frequent temperature cycling. Grades such as Hastelloy C276 resist mixed oxidising reducing acid environments; Incoloy 825 performs well in sulphuric phosphoric mixed solutions, while Monel 400 works reliably for hydrofluoric acid service. The alloy matrix fights pitting, crevice attack and stress corrosion cracking that quickly damage conventional steel tubing.
Good ductility allows the tubing to be coiled and re shaped to fit compact equipment layouts inside reactors and heat exchangers.Our production uses multi pass cold drawing plus intermediate solution annealing to achieve even wall thickness and consistent mechanical properties. Multiple surface finishes including pickling, bright annealed BA and electropolished EP can be supplied. EP finish delivers smooth inner surfaces, reducing fouling and particle build up for high purity chemical workflows. Every batch passes eddy current and dimensional inspection, with full EN 10204 3.1 material test reports provided for traceability.
In real world chemical operations, these coiled tubes are widely fitted for reactor heating cooling coils, heat exchanger bundles, sampling loops for corrosive process fluid, salt chemical production lines and waste treatment process piping. Though the upfront material cost is higher than regular stainless steel, extended service life reduces shutdown frequency and brings better total of ownership value for long run chemical production.
Q&A
Q1: Should chemical process projects pick seamless or welded nickel alloy coiled tubing
A1: Seamless coiled tubing is preferred for high pressure, highly corrosive chemical working conditions, eliminating potential weld zone weakness. Qualified welded coils are acceptable for low pressure circulating systems after full post weld heat treatment and non destructive tests.
Q2: Can nickel alloy coiled tubing be bent again during on site chemical equipment assembly
A2: Yes, thanks to good ductility. However, engineers need to follow minimum bend radius requirements. Too tight bending will cause wall thinning and local stress concentration, which becomes a risk point under corrosive chemical media.
Q3: Which alloy grade do you normally recommend for mixed acid chemical service
A3:Hastelloy C276 is widely selected for mixed oxidising reducing acids. For sulphuric acid dominant streams, Incoloy 825 is a practical option. We suggest sharing full operating temperature, pressure and medium composition for accurate grade recommendation.
Jiangsu Zhongxing Nickel Alloy Co., Ltd. specializes in the R&D and production of seamless pipes and capillary coils. We have a wide product portfolio covering nickel alloys, high-temperature alloys, nickel-copper alloys, nickel-titanium alloys, Invar alloys, soft magnetic alloys and other alloy materials. For more information, factory visits are available. Please contact us at 181-2137-6062 for further inquiries.
