Alloy 625 Heat Exchanger Tube ,Stainless Steel Reducer,Stainless Steel Coil,2205 Stainless Steel Pipe

Key Features of Alloy 625 Heat Exchanger Tube

Exceptional Pitting and Crevice Corrosion Resistance:

High chromium (20–23%) and molybdenum (8–10%) content provide outstanding resistance to pitting and crevice corrosion in chloride-containing environments, seawater, and sour service, with PRE (Pitting Resistance Equivalent) ≥ 45.

Superor Stress Corrosion Cracking Resistance:

High nickel content (≥58%) provides outstanding resistance to chloride-induced SCC and sulfide-induced SSCC, significantly outperforming Alloy 825 and all stainless steel grades.

Outstanding Resistance to Oxidizing and Reducing Acids:

Excellent performance in both oxidizing acids (nitric, chromic) and reducing acids (sulfuric, hydrochloric, phosphoric), with particularly outstanding resistance to hydrochloric acid (HCl) and sulfuric acid (H₂SO₄).

Excellent Resistance to Sour Service (H₂S):

Fully compliant with NACE MR0175/ISO 15156 for sour service applications up to 232°C (450°F), with higher allowable H₂S partial pressures than Alloy 825.

Exceptional High-Temperature Strength and Oxidation Resistance:

Maintains excellent mechanical properties up to 980°C (1800°F) with outstanding creep resistance, oxidation resistance, and carburization resistance.

Niobium Stabilization – No Sensitization:

Niobium addition (3.15–4.15%) stabilizes the alloy against intergranular corrosion and sensitization, eliminating the need for post-weld heat treatment.

Excellent Resistance to Seawater and Biofouling:

Superior performance in seawater applications with excellent resistance to biofouling and marine corrosion.

Good Heat Transfer Efficiency:

Thermal conductivity comparable to other nickel alloys, with excellent heat transfer performance in corrosive environments.

Excellent Weldability:

Nickel-based alloy offers excellent weldability with matching filler metals (ERNiCrMo-3 or ERNiCrMo-4), suitable for tube-to-tubesheet welding. No preheat or post-weld heat treatment required.

High Resistance to Erosion and Corrosion Fatigue:

Outstanding resistance to high-velocity seawater, slurry, and erosion-corrosion applications.

Precision Dimensional Accuracy:

Strict tolerances on outside diameter (OD), wall thickness, and concentricity ensure proper fitment in tube sheets.

International Certification:

Tubes can be certified by ABS, BV, DNV, LR, GL, RINA, CCS, KR, and NK, and comply with NACE MR0175/ISO 15156, ASME Boiler & Pressure Vessel Code Section VIII, and NORSOK M-630 standards.

Alloy 625 Heat Exchanger Tube Related International Standards and Grades

The Alloy 625 Heat Exchanger Tubes produced by Womic Steel conform to multiple international specifications used in extreme corrosive and high-temperature heat transfer equipment:

Standard	Description	Equivalent Grade / Material Number
ASTM B163 / ASME SB163	Seamless nickel and nickel alloy condenser and heat exchanger tubes	UNS N06625 (Alloy 625)
ASTM B444 / ASME SB444	Seamless nickel-chromium-molybdenum alloy pipe and tube	UNS N06625
ASTM B704	Welded nickel alloy tubes for heat exchanger	UNS N06625
ASTM B705	Welded nickel alloy pipe	UNS N06625
EN 10216-5	Seamless stainless steel tubes for pressure purposes (nickel alloy section)	2.4856 (NiCr22Mo9Nb)
DIN 17751	Nickel alloy tubes	NiCr22Mo9Nb (2.4856)
ISO 6207	Nickel alloy seamless tubes	NiCr22Mo9Nb
NACE MR0175 / ISO 15156	Sour service compliance	Alloy 625
ASME Section II	Boiler and pressure vessel code	SB163 N06625

These standards ensure that Alloy 625 Heat Exchanger Tubes meet global requirements for chemical composition, mechanical performance, dimensional accuracy, hydrostatic testing, and non-destructive examination.

Commonly Used Heat Exchanger Tube Grades & Standards Produced by Womic Steel

Different specifications can be customized according to special requirements.

Execution Standard	Main Standard	Standard Grade
ASTM (USA)	ASTM B163, B423, B444, B704, A213, A789	Alloy 625, Alloy 825, Alloy 600, Alloy 400, TP304/L, TP316/L, S31803, S32205, S32750
ASME (USA)	SB163, SB423, SB444, SA213, SA789	Alloy 625, Alloy 825, Alloy 600, TP304/L/H, TP316/L/H, S31803, S32205, S32750
EN / DIN (Europe)	EN 10216-5, EN 10217-7	2.4856 (Alloy 625), 2.4858 (Alloy 825), 1.4404, 1.4462, 1.4410
ISO (International)	ISO 6207, ISO 9329-4	NiCr22Mo9Nb (Alloy 625), NiCr21Mo (Alloy 825)

Chemical Composition of Alloy 625 Heat Exchanger Tube (UNS N06625)

Element

Ni

Cr

Mo

Nb+Ta

Fe

C

Mn

P

S

Si

Al

Ti

Co

Alloy 625

≥58.0

20.0–23.0

8.0–10.0

3.15–4.15

≤5.0

≤0.10

≤0.50

≤0.015

≤0.50

≤0.40

≤1.0

Note: Alloy 625 (UNS N06625) is a high-performance nickel-chromium-molybdenum alloy with niobium stabilization. Compared to other heat exchanger tube grades:

Property	TP316L	Super Duplex 2507	Alloy 825	Alloy 625
Nickel (%)	10–14	6–8	38–46	≥58
Chromium (%)	16–18	24–26	19.5–23.5	20–23
Molybdenum (%)	2–3	3–5	2.5–3.5	8–10
Niobium (%)	—	—	—	3.15–4.15
PRE	24–26	42–45	38–42	≥45
Hydrochloric Acid (HCl)	Poor	Poor	Fair	Excellent
High-Temperature Strength	Poor	Fair	Good	Excellent
Seawater Service	Limited	Good	Excellent	Outstanding
Sour Service (H₂S)	Limited	Excellent	Excellent	Outstanding
Maximum Service Temp (°C)	400	300	540	980
Cost	Low	High	Very High	Premium

Pitting Resistance Equivalent (PRE) Calculation:
PRE = %Cr + 3.3 × %Mo + 16 × %N ≥ 45 (Ni content not included but contributes to SCC resistance)

Comparison of Acid Resistance:

Acid Environment	TP316L	Super Duplex 2507	Alloy 825	Alloy 625
Hydrochloric Acid (HCl) – dilute	Poor	Poor	Fair	Excellent
Sulfuric Acid (H₂SO₄)	Poor	Good	Excellent	Excellent
Phosphoric Acid (H₃PO₄)	Fair	Good	Excellent	Excellent
Nitric Acid (HNO₃)	Good	Good	Excellent	Excellent
Seawater	Poor	Good	Excellent	Outstanding
Chloride SCC	Poor	Excellent	Outstanding	Outstanding

Alloy 625 Heat Exchanger Tube Mechanical Properties and Heat Treatment Requirements

The Alloy 625 Heat Exchanger Tube offers exceptional mechanical properties and high-temperature strength for the most demanding heat transfer applications.

Property	Unit	Alloy 625 (Annealed)
Tensile Strength (min)	MPa	≥825
Yield Strength (0.2% offset, min)	MPa	≥415
Elongation (min)	%	≥30
Hardness (typical)	HRB	≤95
Density	g/cm³	8.44
Melting Range	°C	1290–1350
Thermal Conductivity (20°C)	W/m·K	9.8
Thermal Conductivity (100°C)	W/m·K	10.8
Thermal Conductivity (500°C)	W/m·K	15.5
Thermal Conductivity (900°C)	W/m·K	22.0
Coefficient of Thermal Expansion (20–100°C)	μm/m·K	12.8
Coefficient of Thermal Expansion (20–500°C)	μm/m·K	13.5
Coefficient of Thermal Expansion (20–900°C)	μm/m·K	15.0
Specific Heat Capacity (20°C)	J/kg·K	410
Electrical Resistivity (20°C)	μΩ·m	1.28
Modulus of Elasticity (20°C)	GPa	205

High-Temperature Tensile Properties (Typical Values) :

Temperature (°C)	Tensile Strength (MPa)	Yield Strength (MPa)
20	900–1050	450–550
200	850–980	400–500
400	800–920	380–480
500	750–880	360–450
600	700–820	340–420
700	600–700	300–380
800	450–550	200–280
900	300–400	120–180
980	200–280	80–120

Creep Rupture Strength (Typical Values) :

Temperature (°C)	10,000 Hour Stress (MPa)	100,000 Hour Stress (MPa)
600	250–300	200–240
650	180–220	140–170
700	120–150	90–110
800	50–65	35–45

Maximum Recommended Service Temperatures:

Service Type	Maximum Temperature
Continuous Service (Oxidizing Atmosphere)	980°C (1800°F)
Continuous Service (Reducing Atmosphere)	870°C (1600°F)
Sour Service (NACE MR0175)	232°C (450°F)
Seawater Service	50°C (122°F)
Minimum Service Temperature	-196°C (-321°F)

Critical Note: Alloy 625 maintains excellent strength and oxidation resistance up to 980°C, significantly higher than Alloy 825 (540°C max). This makes Alloy 625 the preferred choice for high-temperature heat exchanger applications in petrochemical, refining, and power generation.

Heat Treatment Condition:

Alloy 625 Heat Exchanger Tubes are normally supplied in the annealed condition (solution annealed at 1095–1205°C) followed by rapid cooling (water quenching or rapid air cooling). This heat treatment:

1. Dissolves precipitated carbides and intermetallic phases.

2. Relieves internal stresses from cold drawing or cold pilgering.

3. Restores optimum corrosion resistance and ductility.

4. Ensures niobium stabilization is effective.

Critical Note: Alloy 625 is niobium-stabilized, which prevents sensitization and intergranular corrosion after welding. Unlike many stainless steels, Alloy 625 can be used in the as-welded condition without post-weld heat treatment for virtually all corrosive environments. This is a significant advantage for field fabrication.

Delivery Condition:
Tubes are normally supplied in annealed and pickled condition, providing a clean, smooth surface and excellent corrosion resistance. Upon request, bright annealed (BA) finish can be provided for applications requiring ultra-clean internal surfaces.

Manufacturing Process of Alloy 625 Heat Exchanger Tube (Seamless)

Womic Steel adopts advanced production technology to ensure each Alloy 625 Heat Exchanger Tube meets exact specifications with flawless surface quality and precise dimensional accuracy.

· Raw Material Selection: High-quality Alloy 625 (UNS N06625) nickel alloy billets from certified premium mills (Special Metals, VDM Metals, Haynes International, Sandvik) with certified chemical composition (Ni ≥58%, Cr 20–23%, Mo 8–10%, Nb 3.15–4.15% verification) and traceability.

· Heating and Piercing: Billets heated to a controlled high temperature (due to high nickel and molybdenum content) and pierced using a rotary piercing mill to form hollow shells. Temperature control is critical.

· Hot Rolling: Shells elongated and rolled to desired intermediate size with strict temperature control. High-strength nickel alloys require careful reduction rates and frequent inspections.

· Cold Drawing / Cold Pilgering: Tubes refined to precise dimensions with improved surface finish. Multiple passes with intermediate annealing required due to high work hardening rate.

· Solution Annealing: Heat treatment at 1095–1205°C to dissolve carbides and restore properties. Performed in controlled atmosphere furnaces for bright annealed finish.

· Pickling & Passivation: Removal of oxides using specialized pickling acids optimized for nickel-chromium-molybdenum alloys; thorough rinsing required.

· Straightening and Dimensional Calibration: Ensures consistent roundness, straightness, and wall uniformity. Special attention to OD tolerance for tube sheet fitment.

· Cutting and End Finishing: Tubes cut to precise lengths with square ends, deburred, and prepared for tube sheet insertion.

· Final Inspection & Marking: Each tube tested, marked with grade, heat number, standard, and tube dimensions before packing.

This process guarantees a smooth internal bore, high structural integrity, precise dimensional accuracy, and exceptional corrosion resistance across all batches of Womic Steel’s Alloy 625 Heat Exchanger Tubes.

Manufacturing Process of Alloy 625 Heat Exchanger Tube (Welded)

Womic Steel utilizes state-of-the-art manufacturing technology to ensure every Welded Alloy 625 Heat Exchanger Tube meets precise specifications and delivers excellent surface quality and performance.

1. Raw Material Selection: High-quality Alloy 625 (UNS N06625) nickel alloy strips/coils from certified premium mills with full traceability.

2. Slitting & Uncoiling: Precision slitting to required width; edge preparation to ensure clean, burr-free edges for welding

3. Forming & Welding: The strip is progressively formed into a cylindrical shape. The edges are welded using advanced TIG or Plasma welding with:

l Strict heat input control

l Shielding gas: Argon + Helium blend for optimal penetration

l Matching filler metal: ERNiCrMo-3 (Alloy 625) for optimal weld properties

l Back purge with argon to protect weld root

4. Weld Seam Treatment: External weld bead removal to achieve smooth surface flush with base metal. Internal bead may be controlled or removed.

5. Solution Annealing: Full heat treatment of the entire welded tube at 1095–1205°C followed by rapid cooling – essential for restoring corrosion resistance and relieving weld stresses.

6. Sizing & Calibration: The tube is passed through a sizing mill to achieve final precise OD and roundness.

7. Straightening: The tube is straightened to ensure optimal linearity for tube sheet insertion.

8. Non-Destructive Testing (NDT) : Weld seam inspected using Eddy Current Testing (ECT) or Ultrasonic Testing (UT). 100% of tube length tested.

9. Hydrostatic Testing: Each tube pressure tested to verify leak-tight integrity.

10.Final Inspection & Marking: Complete dimensional check, visual inspection, and traceable marking.

This controlled process guarantees a sound weld seam, excellent dimensional accuracy, smooth internal surface, and superior corrosion resistance for every batch of Womic Steel’s Welded Alloy 625 Heat Exchanger Tubes.

Alloy 625 Heat Exchanger Tube Dimensions and Tolerances

1. Outside Diameter (OD) : 6.0mm – 114.3mm (1/4″ – 4″)

Common sizes: 9.53mm (3/8″), 12.70mm (1/2″), 15.88mm (5/8″), 19.05mm (3/4″), 25.40mm (1″), 31.80mm (1-1/4″), 38.10mm (1-1/2″), 44.50mm (1-3/4″), 50.80mm (2″)

2. Wall Thickness (WT) : 0.5mm – 5.0mm (BWG 10 – BWG 22)

Due to high strength, thinner walls can be used compared to lower-strength alloy

Common BWG gauges: 10, 11, 12, 13, 14, 15, 16, 18

3. Length: Up to 30m (straight lengths); U-bent tubes available per customer drawing

4. OD Tolerances:

Standard: ±0.10mm

Precision: ±0.05mm (upon request)

5. Wall Thickness Tolerances:

Standard: ±10% of nominal

Precision: ±8% of nominal (upon request)

6. Straightness: 0.5mm per 1000mm length typical, tighter upon request

7. Surface Roughness (Internal) :

Standard: Ra ≤ 0.8μm

Bright Annealed: Ra ≤ 0.4μm (upon request)

ANSI B 36.19/ANSI B36.10 DIMENSIONS OF SEAMLESS &WELDED STAINLESS STEEL PIPE
Nominalsize		mm	ANSIB36.19				ANSIB36.10ANSIB36.10
DN	NPS	mm	5S	10S	40S	80S	10	20	30	STD	40	60	XS	80	100	120	140	160XXS
6	1/8"	10.29		1.24	1.73	2.41				1.73	1.73		2.41	2.41
8	1/4"	13.72		1.65	2.24	3.02				2.24	2.24		3.02	3.02
10	3/8"	17.15		1.65	2.31	3.20				2.31	2.31		3.20	3.20
15	1/2"	21.34	1.65	2.11	2.77	3.73				2.77	2.77		3.73	3.73				4.78	7.47
20	3/4"	26.67	1.65	2.11	2.87	3.91				2.87	2.87		3.91	3.91				5.56	7.82
25	1"	33.4	1.65	2.77	3.38	4.55				3.38	3.38		4.55	4.55				6.35	9.09
32	1 1/4"	42.16	1.65	2.77	3.56	4.85				3.56	3.56		4.85	4.85				6.35	9.70
40	1 1/2"	48.26	1.65	2.77	3.68	5.08				3.68	3.68		5.08	5.08				7.14	10.16
50	2"	60.33	1.65	2.77	3.91	5.54				3.91	3.91		5.54	5.54				8.74	11.07
65	2 1/2"	73.03	2.11	3.05	5.16	7.01				5.16	5.16		7.01	7.01				9.52	14.02
80	3"	88.9	2.11	3.05	5.49	7.62				5.49	5.49		7.62	7.62				11.13	15.24
90	3 1/2"	101.6	2.11	3.05	5.74	8.08				5.74	5.74		8.08	8.08
100	4"	114.3	2.11	3.05	6.02	8.56				6.02	6.02		8.56	8.56		11.13		13.50	17.12
125	5”	141.3	2.77	3.40	6.55	9.52				6.55	6.55		9.52	9.52		12.70		15.90	19.05
150	6"	168.28	2.77	3.40	7.11	10.97				7.11	7.11		10.97	10.97		14.30		18.20	21.95
200	8"	219.08	2.77	3.76	8.18	12.70		6.35	7.04	8.18	8.18	10.30	12.70	12.70	15.10	18.20	20.60	23.00	22.22
250	10"	273.05	3.40	4.19	9.27	12.70		6.35	7.80	9.27	9.27	12.70	12.70	15.09	18.26	21.44	25.40	28.58
300	12"	323.85	3.96	4.57	9.52	12.70		6.35	8.38	9.52	10.31	14.27	12.70	17.48	21.44	25.40	28.58	33.32
350	14"	355.6	3.98	4.78			6.35	7.92	9.52	9.52	11.13	15.09	12.70	19.05	23.83	27.79	31.75	35.71
400	16"	406.4	4.19	4.78			6.35	7.92	9.52	9.52	12.70	16.66	12.70	21.44	26.19	30.96	36.53	40.49
450	18"	459.2	4.19	4.78			6.35	7.92	11.13	9.52	14.27	19.05	12.70	23.83	29.36	34.92	39.67	45.24
500	20"	508	4.77	5.53			6.35	9.52	12.70	9.52	15.09	20.62	12.70	26.19	32.54	38.10	44.45	50.01
550	22"	558.8	4.77	5.53			6.35	9.52	12.70	9.52	15.87	22.22	12.70	28.57	34.92	41.27	47.62	53.97
600	24"	609.6	5.54	6.35			6.35	9.52	14.70	9.52	17.48	24.61	12.70	30.96	38.89	46.02	52.37	59.94
650	26"	660.4					7.92	12.70		9.52			12.70
700	28"	711.2					7.92	12.70	15.88	9.52			12.70
750	30"	762	6.35	7.92			7.92	12.70	15.88	9.52			12.70
800	32"	812.8					7.92	12.70	15.88	9.52			12.70

Surface Conditions of Alloy 625 Heat Exchanger Tube

Womic Steel offers a range of surface finishes for Alloy 625 heat exchanger tubes, each suited to specific corrosive and high-temperature applications.

Surface Type	Description	Typical Applications
Annealed & Pickled (AP Finish)	Standard industrial finish – matte, oxide-free after acid treatment.	Most heat exchanger applications, sour service, seawater, acid service.
Bright Annealed (BA Finish)	Mirror-like surface obtained through controlled atmosphere annealing.	High-purity applications requiring ultra-clean surfaces.
Polished Finish (180#, 240#, 320#)	Smooth mechanical finish, reduced surface roughness.	Reduced fouling applications, food processing, pharmaceutical.
Passivated Finish	Surface chemically treated to enhance the protective passive film.	Critical corrosion service, high-purity systems.

Each Alloy 625 Heat Exchanger Tube surface is inspected for uniform appearance, absence of pits, scratches, and consistent finish quality. Internal surface roughness (Ra) can be certified upon request.

Testing and Inspection of Alloy 625 Heat Exchanger Tube

Every Alloy 625 Heat Exchanger Tube undergoes the most comprehensive inspection regime in accordance with ASTM B163, EN 10216-5, NACE, and NORSOK standards:

Test / Inspection	Description	Applicability
Visual & Dimensional Inspection	Surface finish, OD, WT, length, roundness, straightness checked.	100%
Hydrostatic Pressure Test	100% tested for leakage and pressure resistance.	100%
Pneumatic Pressure Test	Air pressure test under water for leak detection (optional).	Upon request
Eddy Current Test (ECT)	Detects surface and sub-surface imperfections.	100%
Ultrasonic Test (UT)	Ensures internal integrity of tube wall.	Upon request
Positive Material Identification (PMI)	Confirms correct chemical grade (Ni ≥58%, Cr, Mo, Nb verification).	100% (per heat)
Intergranular Corrosion Test (IGC)	ASTM G28 – validates resistance to intergranular corrosion.	Per heat / batch
Flattening Test	Evaluates ductility and deformation capability.	Per heat / batch
Flaring Test	Evaluates ability to expand without cracking.	Per heat / batch
Hardness Testing	Rockwell B or C – confirms mechanical compliance.	Per heat / batch
Tensile Testing	Confirms ≥825 MPa UTS and ≥415 MPa yield strength.	Per heat / batch
High-Temperature Tensile Testing	Optional – verifies high-temperature strength.	Upon request
Creep Rupture Testing	Long-term creep strength verification.	Upon request
Sour Service Qualification	NACE MR0175/ISO 15156 compliance – HIC/SSC testing.	Per project
Pitting Corrosion Test	ASTM G48 – ferric chloride pitting test.	Upon request
Surface Roughness Check (Ra)	For polished or BA tubes – profilometer measurement.	Upon request
Third-Party Inspection	SGS / BV / DNV / TUV / LR – witnessed testing.	Upon customer request

These extensive tests ensure that every Alloy 625 Heat Exchanger Tube from Womic Steel meets the highest international standards for reliability, corrosion resistance, high-temperature performance, and longevity in the most demanding applications.

Applications of Alloy 625 Heat Exchanger Tube

Alloy 625 Heat Exchanger Tubes are specified for the most demanding applications where Alloy 825, super duplex, and all stainless steel grades are insufficient:

Industry	Typical Applications
Oil & Gas (Severe Sour Service)	Sour gas coolers, H₂S-containing heat exchangers, produced water coolers, glycol reboilers, amine regenerator heat exchangers, subsea heat exchangers, HP/HT sour service (NACE MR0175 compliant).
Offshore & Deepwater	Seawater coolers, topside heat exchangers, subsea cooling systems, umbilical tube heat exchangers (ship classification certifications available from ABS, BV, DNV, LR, GL, RINA, CCS, KR, NK).
Chemical Processing	Hydrochloric acid (HCl) coolers and heaters, sulfuric acid heat exchangers, phosphoric acid evaporators, nitric acid heaters, chlor-alkali heat exchangers, vinyl chloride monomer (VCM) heat exchangers.
Power Generation	Flue gas desulfurization (FGD) heat exchangers, scrubber reheaters, condenser tubes (aggressive cooling water), nuclear power heat exchangers, superheater tubes (high-temperature).
Hydrometallurgy	Pressure acid leaching (PAL) heat exchangers, high-temperature solvent extraction heat exchangers, electrowinning solution coolers, nickel/cobalt/copper processing.
Aerospace	Engine heat exchangers, hydraulic system coolers, fuel system heat exchangers, environmental control systems.
Marine Engineering	Seawater-cooled condensers, ballast water heat exchangers, exhaust gas scrubber heat exchangers, marine boiler components.
Pulp & Paper	Bleach plant heat exchangers (chlorine dioxide), black liquor evaporators, digester heat recovery systems (high-chloride environments).
Waste Incineration	Flue gas heat exchangers, acid gas condensers, scrubber reheaters, heat recovery boilers.
Pharmaceutical	High-purity heat exchangers for aggressive cleaning agents, chemical synthesis reactors, high-temperature sterilization systems.
Desalination	High-temperature brine heaters, thermal desalination heat exchangers, zero liquid discharge (ZLD) evaporators.

Alloy 625 Heat Exchanger Tube Packing, Delivery, and Womic Steel’s Transportation Advantage

Each Alloy 625 Heat Exchanger Tube is packed with the highest level of care due to the extreme value, long lead times, and critical nature of these premium products.

Packaging Options:

Packaging Type	Description	Suitable For
Bundle Packing (Hexagonal)	Hexagonal bundle with woven fabric wrapping, iron strip bundle, plastic cap on both ends.	Local truck transport.
Bundle Packing (Square)	Square bundle with steel straps, plastic end caps, moisture barrier paper.	Export sea-worthy transport.
Wooden Crate Packing	Wooden crates with foam padding, individual tube separation, plastic end caps. Mandatory for Alloy 625.	High-value tubes, BA finish, long-length tubes.
Steel Crate Packing	Reinforced steel crates with internal padding.	Heavy-wall tubes, multiple-bundle consolidation.
U-Bend Tube Packing	Custom wooden crates with support saddles to maintain bend radius.	U-bent heat exchanger tubes.

Standard Packaging Details:

End Protection: Plastic caps on both ends for all tubes

Moisture Protection: VCI paper and moisture barrier wrapping for sea freight

Padding: Foam padding between tube layers in crates

Labeling: Grade, heat number, standard, dimensions, PO number

Documentation: Packing list, material test reports (MTR), inspection certificates, NACE compliance certificates

Womic Steel’s Shipping and Delivery Strengths for Heat Exchanger Tubes:

Direct cooperation with global shipowners ensures the most competitive freight rates.

Professional loading and securing teams – special care for tube bundles to prevent bending, scratching, and end damage.

Efficient document preparation – EN 10204 3.1/3.2 certificates, MTR, PMI reports, IGC test reports, NACE certificates – minimizing customs delays.

Rapid delivery time – select sizes of Alloy 625 maintained in ready stock.

Continuous cargo tracking and after-sales follow-up to ensure smooth arrival at destination.

Custom length cutting available upon request – up to 30m straight lengths.

U-bend tube fabrication – custom bending per customer drawing with full heat treatment after bending.

Why Choose Womic Steel’s Alloy 625 Heat Exchanger Tube

Womic Steel is a trusted manufacturer and exporter specializing in high-performance nickel alloy heat exchanger tubes, committed to delivering premium quality and professional service for the world’s most demanding corrosive and high-temperature heat transfer applications.

1. Strict quality control under ISO 9001, PED 2014/68/EU, and ASME Boiler & Pressure Vessel Code certification.

2. Premium nickel alloy expertise – specialized knowledge in high-nickel (≥58%) alloy heat treatment, niobium stabilization, and sour service qualifications.

3. Modern production lines – cold pilger mills, TIG welded tube mills, bright annealing furnaces.

4. Complete in-house testing – including PMI, mechanical testing, IGC testing, and NACE sour service qualification support.

5. NACE MR0175 / ISO 15156 compliance – full documentation for sour service applications up to 232°C.

6. Exceptional acid resistance – outstanding performance in hydrochloric, sulfuric, phosphoric, and nitric acid service.

7. Superior chloride SCC resistance – high nickel content (≥58%) provides outstanding resistance to SCC.

8. Excellent high-temperature strength – continuous service up to 980°C (1800°F).

9. No post-weld heat treatment required – niobium stabilization eliminates PWHT requirements.

10.Flexible customization – special OD, WT, length, surface finish (BA, polished), U-bends.

11.Fast production cycle – seamless and welded tube manufacturing with competitive lead times.

12.Reliable global shipping – to all major ports (Houston, Aberdeen, Dubai, Singapore, Perth, Rio de Janeiro, etc.).

13.Direct mill relationships – competitive pricing for premium nickel alloy products.

14.Wide material range – from stainless steel to Duplex, Super Duplex, Alloy 825, Alloy 625, Alloy 600, Alloy C276, and more.

Contact Womic Steel

For inquiries, technical support, or to request a quotation for your specific clad pipe requirements, please contact us:

Website: www.womicstainless.com

E‑mail: info@womicstainless.com

Tel / WhatsApp / WeChat:

Victor: +86 15575100681

Jack: +86 18390957568

Womic Steel – Your reliable partner for high‑quality stainless steel seamless pipes, metallurgically bonded clad tubes, and custom solutions for corrosion‑resistant applications.