Alloy 625 Tube
Austenitic / Duplex Steel / Nickel Alloy / Cobalt AlloyMTSCO entered the industrial metals sector in 2006. We have long served industrial sectors such as chemical processing, energy equipment, and seawater desalination, participating in numerous international projects.
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Alloy 625 Seamless Pipe Annealed Pickled For Chemical Processing
Why Choose MTSCO?
MTSCO entered the industrial metals sector in 2006. We have long served industrial sectors such as chemical processing, energy equipment, and seawater desalination, participating in numerous international projects.
For highly corrosion-resistant piping like Alloy 625 seamless pipe, MTSCO places a strong emphasis on process management and delivery schedule forecasting. Through raw material verification, production stage monitoring, QC inspection scheduling, and shipment coordination, we help clients maintain clear visibility of product status throughout the procurement process, thereby mitigating project risks associated with material delays or insufficient quality verification.
Specification Table
Item | Specification |
Product Name | Alloy 625 Seamless Pipe Annealed Pickled For Chemical Processing |
Material Grade | Alloy 625 / UNS N06625 |
Product Type | Seamless Pipe |
Standard | ASTM B444 / ASTM B829 |
Size Range | OD 8mm–711mm, WT 1mm–50mm, Length ≤12m |
Surface | Annealed Pickled |
Inspection | Appearance & Dimensional Test, PMI, UT, ET, HT, Physical & Chemical Test |
Certificates | ISO, PED, AD2000, NORSOK M650, TS |
Package | End Protection / Woven Bags / Wooden Cases |
Application | Chemical Processing, Corrosion Resistant Pipeline, Acidic Media Service, Industrial Piping System |
Product Advantages
· Stable Corrosion Resistance
Alloy 625 contains nickel, chromium, molybdenum, and niobium, exhibiting excellent corrosion resistance across a wide range of corrosive media.
· Suitable for Complex Operating Conditions
Maintains superior performance in acidic media, chloride-containing environments, and conditions involving temperature fluctuations.
· Controllable Delivery Schedules
Production schedules are secured in advance and key milestones monitored to ensure delivery aligns with project timelines.
· Traceable Quality
Comprehensive records covering the entire process—from raw materials and production to inspection—allow for rapid issue identification.
· Integrated Procurement Support
We can coordinate the supply of complementary products such as pipe fittings and flanges, simplifying supply chain management.

What are the characteristics of a pickled surface?
The surface pickling process of stainless steel pipes involves treating the surface with an acidic solution, such as sulfuric or hydrochloric acid, to remove impurities like oxides, oil residue, and welding scales. This method cleanses the surface, eliminating oxide layers and providing a cleaner and smoother appearance to the stainless steel surface. This treatment enhances the corrosion resistance of the pipes and makes them more suitable for various applications, such as in chemical industries and oil processing. The pickled surface of stainless steel pipes typically exhibits increased luster, improving both the quality and appearance of the pipes.
Packing Method Of 625 Nickel Alloy Seamless Pipe
Product | Packaging |
LCL PIPE | Plywood crate + protective pipe caps on both ends |
FCL PIPE | Woven bag + protective pipe caps on both ends |
LCL/FCL TUBE | Plywood crate + individual plastic bag wrapping + end caps on both sides |
Production and Inspection Traceability
· Production Process Records
Raw material details, specifications, and MTC (Material Test Certificate) data are verified prior to production. Key steps—such as piercing, cold rolling or cold drawing, heat treatment, and pickling—are documented via process cards, enabling the tracking of production status for every batch of pipe.
· Inspection Result Correlation
Inspection items (including visual appearance, dimensions, PMI, UT, ET, and HT) are linked to specific product batches. This allows for quick reference to specific inspection stages when clients need to review quality issues or verify testing status.
· Packaging and Shipment Verification
Details regarding product marking, end protection, packaging methods, container loading, and shipment information are recorded. This facilitates easy verification of product origin and batch information for clients during receipt, warehousing, installation, or subsequent communications.
FAQ
Q1: For which chemical industry applications is Alloy 625 seamless pipe suitable? A1: It is suitable for use in chemical pipelines, the transport of acidic media, corrosive fluid systems, and connecting piping for heat exchange equipment.
Q2: What are the benefits of an "Annealed & Pickled" surface finish for installation?
A2: An "Annealed & Pickled" finish helps remove oxide scale, facilitating visual inspection, welding preparation, and subsequent industrial assembly.
Q3: What types of testing can be performed on this Alloy 625 seamless pipe?
A3: Common tests include PMI, visual and dimensional inspection, UT, ET, HT, mechanical property testing, and chemical composition analysis. Specific testing requirements can be arranged according to the order specifications.
Q4: Can it be purchased together with fittings and flanges?
A4: Yes. MTSCO can supply seamless pipes, fittings, flanges, and related nickel alloy materials in a coordinated manner based on project requirements, simplifying specification alignment and shipment arrangements for the customer.
Manufacturing Experience
Plant Area
Max Diameter of Welded Pipe
Annealing Furnace Length
Nickel Alloy
NI-MO: N10001,N10665,N10675...
NI-CR-MO: N10276,N06022,N06035,N06455,N06002...
NI-CR-MO-CU: N06030,N06200,N08031,N08825,N08020...
NICR-MO-W: N06230...
NICKEL: N02200,N02201...
NI-CU: N04400,N05500...
NI-CR-FE: N06600,N06601,N06690,N08800,N08810,N08811...
NI-CR-MO-NB: N06625,N07718...
Austenitic
304/L/H/N, 316/L/H/N/Ti, 321/H, 309/H, 310S, 347/H, 317/L, 904L...
Duplex Steel
31803, 32205, 32750, 32760...
Cobalt Alloy
Alloy 188/ UNS R30188, Alloy L-605/ UNS R30605, Alloy S-816, Alloy 6B, UMCo50, FSX-414, MP-159...
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