Which titanium grades and standards does Jovzi supply?

We supply commercially pure Gr1, Gr2 and alloyed Gr5 (Ti-6Al-4V), Gr7, Gr9 and Gr12, plus NiTi shape memory alloy. Products are made to ASTM B348, B338, B265, B381, B363, ASME B16.5, DIN 912 and AWS A5.16, or to the buyer's drawing.

Do you provide mill test certificates for titanium products?

Yes. Every shipment can be supplied with an EN 10204 3.1 mill test certificate showing heat number, chemical composition and mechanical properties. Independent test reports issued by the BaoTi Test Center are available on request.

What is the minimum order quantity?

MOQ depends on the product: titanium bars start from 1 kg, flanges and stub ends from 1 piece or 1 kg, and standard fasteners from 100 to 200 pieces. Custom parts are quoted per drawing.

Can you manufacture custom titanium parts to drawing?

Yes. We offer OEM and buyer-label service with more than six years of OEM experience. Send 2D or 3D drawings (PDF, DWG or STEP) with grade, tolerance, surface finish and quantity.

Which payment and delivery terms are accepted?

We accept T/T, L/C, PayPal, Western Union and Escrow, and ship under FOB, CFR, CIF, EXW, CIP, FCA, CPT, DDP, DDU or express delivery.

Titanium Heat Exchanger Tube Supplier & Exporter for Chongjin

ASME SB338 / ASTM B338 Grade 1, 2, 7 & 12 Precision Seamless and Welded Heat Transfer Tubing for Chongjin Heavy Industrial, Marine Chemical, and Power Infrastructure

High-Integrity Mill Products

Engineered Titanium Components & Thermal Transfer Solutions

Direct manufacturer stockholding and precision machining from Baoji, China's Titanium Valley, customized to withstand the aggressive coastal-marine and pyrometallurgical environments of North Hamgyong Province.

Ti-pure Titanium Seamless Concentric Reducer Pipe Fitting

Ti-Pure Titanium Seamless Concentric Reducer Fitting

Standard: ASTM B363 / ASME SB363
Grade: Gr.1, Gr.2 (Pure CP)
Application: Exchanger Nozzles & Lines

Technical Specs

Customized Anodizing Gr1 Gr2 Titanium Jigs

Customized Anodizing Gr1/Gr2 Titanium Fixture Jigs

Material: CP Titanium Gr1 / Gr2
Feature: High Electrical Conductivity
Resistivity: Acid Bath Anodizing

Technical Specs

Anodizing Titanium Jig Hanger Rack Frame

Titanium Jig Hanger Rack Frame for Plating Lines

Construction: TIG Argon-Shielded Welded
Corrosion Class: Chromic/Sulfuric Acids
Lifespan: 5x vs Stainless Steel

Technical Specs

Titanium Gr5 Ti-6Al-4V Forged Block ASTM B348

Standard: ASTM B348 / AMS 4928
Tensile: ≥895 MPa Yield Strength
Finish: Milled / Forged Surface

Technical Specs

ASTM F136 Gr5 ELI Ultra-Pure Titanium Round Disc

Purity: Extra Low Interstitial (ELI)
Biocompatibility: Medical / Chemical Precision
Diameter: 98mm Standard Puck

Technical Specs

Gr2 Titanium 30 Split Fingers Disk Rack Dia220mm

Configuration: 30 Precision Split Fingers
Thickness: 1.5mm Laser Profiling
Process: Electropolishing / Etching

Technical Specs

High Quality Gr5 Titanium Bolt M6 M8 M10 DIN912

Gr5 High-Strength DIN912 Titanium Socket Head Bolts

Execution: DIN 912 / ISO 4762
Thread: Rolled Threads M6, M8, M10
Corrosion: Chloride Pitting Proof

Technical Specs

ASTM B338 Gr2 / Gr7 Seamless Heat Exchanger Tubing

Tolerance: ASTM B338 / ASME SB338
Integrity: 100% Eddy Current & Hydro
Condition: Bright Vacuum Annealed

Technical Specs

2006

Established In Baoji

100%

NDT Inspected Lots

3.1 MTC

EN 10204 Traceability

≤ 8 Hrs

Inquiry Quote Turnaround

E-E-A-T Technical Briefing

Engineering Titanium Heat Exchanger Tubes for Chongjin's Industrial Corridors

Chongjin, as North Hamgyong Province’s primary industrial gateway and seaport, sustains intensive metallurgical complexes, coastal coal-fired thermal generation, chemical processing centers, and heavy marine logistical hubs. Equipment working inside Chongjin harbor facilities, the Kim Chaek Iron & Steel complex, local chemical plants, and maritime shipping conduits operates under acute thermal and chemical stress. Jovzi Titanium Industry Co., Ltd. supplies ASTM B338 and ASME SB338 Grade 1, Grade 2, Grade 7 (Palladium-stabilized), and Grade 12 (Mo-Ni alloyed) seamless and welded condenser tubes engineered precisely to conquer sea-water cooling corrosion, high-velocity particulate scouring, and reducing-acid environments.

Zero Seawater Corrosion

Unlike Cu-Ni, Admiralty Brass, or standard 316L stainless steel, titanium naturally generates an instantaneous, self-healing TiO2 rutile oxide passive layer. It withstands sea-water velocities exceeding 20 m/s without suffering impingement, pitting, or microbiologically influenced corrosion (MIC) in the Sea of Japan / East Sea waters off Chongjin.

Superior Heat Transfer Performance

Because titanium tubes possess superior mechanical strength and total resistance to seawater pitting, wall thicknesses can be safely optimized to thin-wall gauges (0.5mm, 0.7mm, or 1.0mm). This reduces thermal resistance across the tube wall while eliminating fouling allowance factors, keeping condenser efficiency consistently elevated.

High Sulfur & Gas Resistance

For Chongjin's heavy pyrometallurgical operations and sintering flues, our Grade 7 (0.15% Pd) and Grade 12 titanium tubes deliver exceptional resistance against wet chlorine, sulfuric acid condensation, and ammonium chloride compounds at temperatures up to 260°C.

Technical Data

Heat Exchanger Tube Specification & Mechanical Characteristics

ASTM B338 / ASME SB338 Standard Dimensions, Chemistries, and Quality Tolerances

Titanium Grade	UNS Designation	Tensile Strength (Min)	Yield Strength (Min)	Typical Heat Transfer Application
Grade 1 (CP4)	UNS R50250	240 MPa (35 ksi)	170 MPa (25 ksi)	Plate-and-frame exchangers requiring extreme cold deep-drawing and high thermal ductility.
Grade 2 (CP3)	UNS R50400	345 MPa (50 ksi)	275 MPa (40 ksi)	The workhorse for surface condensers, power generation cooling towers, and refinery tube bundles.
Grade 7 (Ti-0.15Pd)	UNS R52400	345 MPa (50 ksi)	275 MPa (40 ksi)	High crevice-corrosion environments containing hot reducing hydrochloric or sulfuric acids.
Grade 12 (Ti-Mo-Ni)	UNS R53400	483 MPa (70 ksi)	345 MPa (50 ksi)	High-pressure, elevated-temperature chemical reboilers and evaporators up to 300°C.

Localized Field Deployment

Chongjin Application Scenarios for Titanium Heat Exchanger Tubing

Targeted thermal component integration across North Hamgyong heavy industries

1. Coastal Power Plant Steam Surface Condensers

Thermal power units utilizing raw cold water from Chongjin Harbor frequently suffer from galvanic breakdown and bio-slimy scaling inside copper alloy tubes. Jovzi’s Grade 2 cold-drawn seamless tubes eradicate cooling water contamination, prevent boiler feedwater salinity leaks, and provide multi-decade operational cycles without tube plugging.

2. Blast Furnace Gas Scrubbing & Sulfuric Acid Recovery

In integrated steelworks like Kim Chaek, flue gas desulfurization (FGD) systems produce aggressive sulfur dioxide and sulfurous acid mists. Our ASTM B338 Grade 7 and Grade 12 welded titanium tubes eliminate localized pitting attack in demisters and recirculating wash heat exchangers where conventional austenitic grades corrode within months.

3. Marine Vessel Engine Coolers & Port Ship Repair

Chongjin’s naval docks, trawler fleets, and coastal cargo carriers require compact, lightweight shell-and-tube coolers. Grade 2 titanium tubes allow 45% weight reductions versus cupronickel systems while resisting cavitation damage caused by erratic harbor water sediment flow.

Procurement Knowledge Base

Frequently Asked Questions: Sourcing Titanium Tubing for Chongjin

Key metallurgical, testing, and logistical criteria addressed by Jovzi engineering staff

What tube wall thicknesses and outside diameters do you supply for heat exchangers?

We manufacture both seamless (cold-drawn, vacuum annealed) and welded (TIG / Plasma continuous weld) tubes complying with ASTM B338 / ASME SB338. Common standard outer diameters range from 9.52 mm (3/8") to 38.1 mm (1-1/2"), with typical wall gauges ranging from 0.5 mm to 2.11 mm. Custom U-bent tubes with precision-controlled leg lengths and customized thinning rates are fabricated directly to buyer condenser drawings.

How does Jovzi ensure tube pressure integrity and structural quality?

Every linear meter of heat exchanger tube undergoes non-destructive examination (NDE). Standard factory quality testing includes 100% Eddy Current Testing (ASTM E426), hydrostatic pressure testing (up to 30 MPa), pneumatic testing under water, flattening tests, flaring/expansion tests, and microstructural analysis. Independent testing certificates by the authorized BaoTi Test Center are provided with EN 10204 3.1 MTCs showing exact melt heat numbers.

Should Chongjin projects select Seamless or Welded Titanium Tubing?

For critical coastal condensers and high-vibration power generation cooling, high-grade TIG welded and cold-reduced tubes (ASTM B338) are widely preferred due to tighter wall-thickness uniformity, concentricity, and superior internal surface smoothness. For extreme high-pressure chemical reboilers and acid heaters exceeding 4 MPa shell pressure, Jovzi's Grade 2 and Grade 12 seamless tubes provide uninterrupted structural continuity.

What packaging and moisture-proofing is implemented for sea and cross-border transport?

Heat exchanger tubes are bundled with plastic end caps, interleaved with neutral wax paper or polyethylene sleeves to eliminate surface fretting during haulage, wrapped in heavy waterproof plastic sheeting, and secured in rigid, ISPM-15 heat-treated export wooden cases. Structural internal dividers prevent bending or sagging during cargo crane loading.

Can you supply matching titanium tube sheets, baffles, and pipe fittings?

Yes. As a comprehensive titanium mill products manufacturer in Baoji, Jovzi supplies complete heat exchanger material packages including ASTM B265 Grade 1/2 tube sheets, forged titanium flanges (ASME B16.5), titanium stub ends (ASTM B363), concentric reducers, and Grade 5 chassis fasteners to guarantee uniform galvanic balance across the heat transfer vessel.

Why Project Engineers & Importers Rely On Jovzi Titanium

Direct manufacturer capabilities headquartered in Gaoya Industrial Zone, Baoji High-Tech Development Zone — China's premier titanium manufacturing center.

Baoji Titanium Valley Origin

Founded in 2006, Jovzi operates direct smelting, forging, drawing, and machining infrastructure. We source select 0A sponge titanium ingots, guaranteeing pristine chemistry, low iron content, and traceable melt batches from raw block to ready tube bundle.

Experienced Technical Personnel

Our engineering cadre includes 4 senior metallurgists and 5 intermediate engineers specializing in corrosion science, thermal boundary layer efficiency, and ASME boiler code fabrication, backed by more than 19 years of stable export performance.

Certified Quality & Traceability

Certified under ISO 9001 Quality Management Systems. Every delivery includes comprehensive mechanical, dimensional, and chemical certificates with mill test reports verifiable through independent BaoTi Testing Laboratories.

Request a Direct Engineering Quote for Chongjin Projects

Need custom ASTM B338 Grade 2 or Grade 7 heat exchanger tubing, U-bent bundles, or titanium tube-sheets? Connect directly with our metallurgists in Baoji for rapid pricing, tolerances, and production scheduling.

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