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Home > Seamless Pipe > ASTM A333 / ASME SA333

ASTM A333 / ASME SA333 LTCS Pipe Manufacturer, Supplier & Exporter – Inox Steel India

Grades: 1, 3, 6, 7, 8, 9 — Low Temperature Carbon Steel (LTCS) Pipes

Inox Steel India is one of India’s leading manufacturers, suppliers, and exporters of ASTM A333 / ASME SA333 Low Temperature Carbon Steel (LTCS) Pipes, delivering high-quality seamless pipes designed for extremely low-temperature and cryogenic services. Our LTCS pipes are widely supplied to LNG terminals, gas processing plants, refineries, power plants, petrochemical units, and cryogenic storage facilities across the GCC, Middle East, Africa, Europe, USA, Canada, and South America.

We specialize in supplying the full range of A333 Grades 1–9, including the most widely used Grade 6, and high-performance cryogenic grades such as Grade 7 (0.4–0.7% Ni) and Grade 8 (9% Nickel Steel). These materials are designed to withstand severe temperature drops—ranging from −45°C to −260°C—while maintaining high impact toughness and structural integrity.

Every LTCS pipe manufactured at Inox Steel India undergoes impact testing, hydrostatic testing, ultrasonic inspection, eddy current testing, hardness testing, tensile testing, and full dimensional accuracy checks to ensure compliance with ASTM A333, ASME SA333, IBR (if required), and refinery-grade quality standards.

Our LTCS pipes are extensively used for cryogenic pipelines, LNG handling lines, chilled water systems, low-temperature fluid transport, heat exchangers, and underground low-temp distribution networks, where reliability under rapid thermal contraction and high pressure is crucial.

Table of Contents

What Is ASTM A333 LTCS Pipe and How Is It Manufactured?

ASTM A333 (also ASME SA333) is a specification for seamless Low Temperature Carbon Steel pipes designed specifically for cryogenic and sub-zero temperature service.

These pipes are engineered to resist:

  • Brittle fracture
  • Low-temperature cracking
  • Thermal contraction stress
  • High impact load at sub-zero conditions

Manufacturing Process:

  1. Billet Selection: High-purity LTCS billets with the correct chemistry (Carbon, Mn, Ni content).
  2. Heating & Piercing: Billets are heated and pierced to create a seamless shell.
  3. Hot Rolling: Shell is rolled into precise OD & wall thickness.
  4. Cold Drawing (Required for precise cryogenic use): Provides higher toughness, better surface finish & dimensional precision.
  5. Heat Treatment (Normalize / Quench & Temper): Enhances low-temperature impact resistance.
  6. Impact Testing (Charpy V-Notch): Mandatory at the grade-specified temperature
    (Example: Grade 6 → −45°C, Grade 7 → −195°C, Grade 8 → −260°C)
  7. Final NDT & Dimensional Check: UT, Hydro, ECT, Visual, and surface finishing confirmations.

Every LTCS pipe from Inox Steel India is built for cryogenic safety, long-term durability, and pressure stability.

Grades & Standards Available

Grade Min Temperature Typical Use Notes
A333 Gr 1 −45°C LT fluid lines General LTCS piping
A333 Gr 3 −100°C Refrigeration Better impact values
A333 Gr 6 −45°C LNG & refineries Most widely used LTCS grade
A333 Gr 7 −195°C Cryogenic gas 0.4–0.7% Ni
A333 Gr 8 −260°C LNG, LOX, LH2 9% Nickel alloy
A333 Gr 9 −75°C Chilled water & cold boxes Medium-temp cryogenic service

Master Technical Datasheet — ASTM A333 / ASME SA333 (LTCS)

Parameter / Property Grade 1 Grade 3 Grade 6 Grade 7 Grade 8 Grade 9
Material Type LTCS LTCS LTCS LTCS LTCS LTCS
Standard / Spec ASTM A333 / ASME SA333 ASTM A333 / ASME SA333 ASTM A333 / ASME SA333 ASTM A333 / ASME SA333 ASTM A333 / ASME SA333 ASTM A333 / ASME SA333
Service Type Low Temperature Low Temperature Low Temperature Low Temperature Low Temperature Low Temperature
Min Temperature −45°C −100°C −45°C −195°C −260°C −75°C
Tensile Strength (MPa) 380 450 415 485 520 450
Yield Strength (MPa) 205 240 240 310 345 275
Elongation (%) 30 28 30 22 20 25
Impact Test @ LT −45°C −100°C −45°C −195°C −260°C −75°C
Chemical Composition – C 0.30 Max 0.19 Max 0.30 Max 0.19 Max 0.13 Max 0.20 Max
Chemical Composition – Mn 0.40–1.06 0.31–0.64 0.29–1.06 0.40–0.70 0.40–0.90 0.40–0.70
Chemical Composition – Ni – – – 0.40–0.70 8.40–9.60 –
Manufacturing Method Seamless Seamless Seamless Seamless Seamless Seamless
Equivalent Standards LTCS LTCS LTCS 1% Ni Alloy 9% Ni Alloy LTCS
Available Sizes ½″ – 36″ ½″ – 36″ ½″ – 36″ ½″ – 36″ ½″ – 36″ ½″ – 36″
Schedules SCH 20 – XXS SCH 20 – XXS SCH 20 – XXS SCH 20 – XXS SCH 20 – XXS SCH 20 – XXS
End Finishes Plain / Bevelled Plain / Bevelled Plain / Bevelled Plain / Bevelled Plain / Bevelled Plain / Bevelled
Primary Applications LT service Cryogenic LT service LNG Cryo LNG / Liquid Gas Chilled service
HSN Code 7304.19.90 7304.19.90 7304.19.90 7304.19.90 7304.19.90 7304.19.90
Certifications EN 10204 3.1 / 3.2 EN 10204 3.1 / 3.2 EN 10204 3.1/3.2 EN 10204 3.1/3.2 EN 10204 3.1/3.2 EN 10204 3.1/3.2

 

Key Factors to Consider When Selecting LTCS Pipes

01.

Temperature Requirements

Each A333 grade corresponds to a minimum operating temperature.
Choose based on cryogenic or low-temp application.

02.

Pressure Rating

Schedules SCH 20 to XXS available depending on pressure.

03.

Nickel Content Requirement

  • Gr 7 → Low nickel (0.4–0.7%)
  • Gr 8 → High nickel (9%) for deep cryogenic LNG service

04.

Impact Testing Compliance

Charpy V-Notch values must meet ASTM requirements at actual service temperature.

05.

Certification

We supply LTCS pipes with:

  • EN 10204 3.1 / 3.2
  • NDT reports
  • Creep & hardness test reports
  • IBR approval (if required)
  • LNG/Cryo-specific documentation

 Global & Indian Market Demand

India:

Used extensively in LNG terminals, gas processing units, refineries, cryogenic storage areas.

Middle East:

UAE, Qatar, Saudi Arabia import large volumes for:

  • LNG plants
  • Cryogenic storage
  • Low-temperature hydrocarbon service

Africa:

South Africa, Nigeria, Kenya use LTCS pipes for gas distribution and cooling networks.

Europe & Americas:

LNG terminals, fuel gas handling, petrochemical plants require A333 Grade 6 / Grade 8.

Inox Steel India delivers globally via Mundra, Hazira, JNPT ports.

Applications and Technical Specifications by Grade and Standard

ASTM A333 / ASME SA333 Low Temperature Carbon Steel (LTCS) Pipes supplied by Inox Steel India are engineered to perform under extremely low temperatures, ranging from −45°C to −260°C, depending on the grade. These pipes offer excellent impact toughness, weldability, and pressure resistance — making them ideal for LNG terminals, cryogenic plants, gas processing units, and cold-temperature fluid lines.

Below are grade-wise applications, dimensional chart, indicative pricing, and QA details in the exact stainless steel page style you prefer.

Applications by Grade / Type / Size

ASTM A333 Grade 1 — LTCS for General Low Temperature Lines

Service Use:
Low-temperature fluid transportation and refinery piping.

Typical Applications:

  • Low-temperature process lines
  • Refrigeration units
  • Cold climate gas pipelines
  • Industrial LTCS applications
  • Heat exchanger tubes

Temp Range:
−45°C service

Size Range:
½″ to 36″ NPS (SCH 20 to SCH 160)

Industries:
Chemical | Gas | Refrigeration | Process Plants

 

ASTM A333 Grade 3 — Sub-Zero Refrigeration Service

Service Use:
Medium cryogenic pipelines requiring higher impact toughness.

Typical Applications:

  • Refrigeration systems
  • Sub-zero cooling pipelines
  • Low-temperature chemical plants
  • Ammonia cold storage lines

Temp Range:
−100°C service

Size Range:
½″ – 24″ NPS

Industries:
Food Processing | Refrigeration | Petrochemical

ASTM A333 Grade 6 — MOST WIDELY USED LTCS PIPE

Service Use:
Standard LTCS grade used globally in refineries, LNG, power plants.

Typical Applications:

  • LNG transfer lines
  • Low-temperature hydrocarbon service
  • Refineries & gas processing
  • Heat exchangers & boilers
  • Chilled water systems
  • Underground low-temperature pipelines

Temp Range:
−45°C service

Size Range:
½″ – 36″ NPS (SCH 20 to XXS)

Industries:
Oil & Gas | Refineries | Power Plants | LNG

 

ASTM A333 Grade 7 — Cryogenic Service (Nickel Alloyed)

Service Use:
Cryogenic temperature applications due to nickel content.

Typical Applications:

  • Liquid nitrogen lines
  • Liquid oxygen systems
  • Cryogenic storage systems
  • Cold box pipelines

Temp Range:
−195°C service
(Ni content 0.4–0.7%)

Industries:
LNG | Cryogenic Storage | Steel Plants | Gas Plants

ASTM A333 Grade 8 — Deep Cryogenic (9% Nickel Steel)

Service Use:
Ultra-low temperature pipelines for LNG, LOX, LH2.

Typical Applications:

  • LNG transfer lines
  • Liquid hydrogen storage
  • Liquid oxygen pipelines
  • Ultra-cryogenic transport

Temp Range:
−260°C service

Industries:
LNG | Hydrogen | Aerospace | Cryogenic Storage

 

ASTM A333 Grade 9 — Chilled Water & Partial Cryo

Service Use:
Medium cold-temperature mechanical systems.

Typical Applications:

  • Chilled water systems
  • Low-temperature mechanical piping
  • Cooling lines in power plants

Temp Range:
−75°C service

Industries:
HVAC | Mechanical | Power Plants

ASTM A333 LTCS Pipe Size & Dimensional Chart

NPS (Inch) OD (mm) Wall Thickness (SCH 40) Approx. Weight (kg/m)
½″ 21.3 2.77 1.27
1″ 33.4 3.38 2.73
2″ 60.3 3.91 5.44
3″ 88.9 5.49 10.88
4″ 114.3 6.02 14.98
6″ 168.3 7.11 28.26
8″ 219.1 8.18 41.95
10″ 273.1 9.27 62.42
Download Full ASTM A333 Size & Schedule Chart (PDF)

ASTM A333 LTCS Pipe Price List (Indicative 2025)

Grade / Standard Size Range (NPS) Avg. Price INR/kg (FOB Mumbai) Approx. USD/kg (FOB India) Typical Use
A333 Gr 1 ½″–36″ ₹ 110 – ₹ 135 $1.55 – $1.95 LTCS pipelines
A333 Gr 3 ½″–24″ ₹ 150 – ₹ 185 $2.10 – $2.60 Sub-zero cooling
A333 Gr 6 (MOST USED) ½″–36″ ₹ 135 – ₹ 170 $1.90 – $2.35 LNG, Refineries
A333 Gr 7 ½″–16″ ₹ 260 – ₹ 325 $3.30 – $4.00 Cryogenic (-195°C)
A333 Gr 8 (9% Ni) ½″–16″ ₹ 380 – ₹ 520 $5.10 – $7.00 LNG (-260°C)
A333 Gr 9 ½″–24″ ₹ 155 – ₹ 185 $2.30 – $2.60 Chilled water
Download: A333 LTCS Price List 2025 (PDF)

HSN Code / HS Code for A333 LTCS Pipes

✔ HSN 7304.19.90 — LTCS Seamless Carbon Steel Pipes
(All grades 1–9)

Testing & Quality Assurance at Inox Steel India

Every LTCS pipe undergoes rigorous quality checks to ensure suitability for low-temperature environments.

Quality Tests Conducted:

  1. Charpy V-Notch Impact Test (Mandatory for A333)
  2. Hydrostatic Pressure Test
  3. Ultrasonic Test (UT)
  4. Eddy Current Test (ECT)
  5. Flattening & Bend Test
  6. Hardness & Tensile Testing
  7. Grain Structure & Microanalysis
  8. Dimensional & Visual Inspection

Documentation Supplied:

  • EN 10204 3.1 / 3.2 MTC
  • Charpy impact test report
  • NDT reports
  • Pressure test report
  • Heat treatment chart
  • LNG/cold-service compliance documents
  • Third-party inspection (SGS, TUV, BV, DNV, Lloyds)

Why Choose Inox Steel India for ASTM A333 LTCS Pipes

Inox Steel India is a trusted global supplier of Low Temperature Carbon Steel (LTCS) ASTM A333 / ASME SA333 Pipes, serving LNG terminals, refineries, gas processing plants, power plants, and cryogenic industries worldwide.
Our expertise in A333 Grades 1–9, especially Grade 6 and Grade 8, makes us a preferred partner for highly sensitive low-temperature and cryogenic piping systems.

Core Advantages of Inox Steel India:

  1. Complete Range: Grades 1 to 9 (Seamless LTCS Pipes): From −45°C to −260°C service temperature — all cryogenic grades available.
  2. Specialization in A333 Grade 6 & Grade 8 (9% Nickel Steel): Highly demanded in LNG, LOX, LH2, and deep cryogenic service.
  3. Strict Low-Temperature Impact Testing (CVN): Each batch undergoes Charpy V-Notch tests at specific service temperatures.
  4. Advanced Manufacturing & Heat Treatment: Ensures ductility, fine grain structure, and cryogenic stability.
  5. Global Approvals & Certifications: EN 10204 3.1/3.2 • IBR • NDT Reports • LNG Service Documentation • TPI
  6. Ready Stock ½″ – 36″ in Grade 6: Fast delivery for shutdowns, LNG retrofits, and turnkey EPC projects.
  7. Exporting to 60+ Countries: Fast shipping from JNPT, Hazira & Mundra ports.
  8. Competitive Pricing for Cryogenic Grades: Best rates for Grade 6, Grade 7 & 9% Nickel Grade 8.

Inox Steel India ensures reliability and safety in every low-temperature and cryogenic piping system.

Industries & Applications We Serve

Industry Application Preferred Grades
LNG Terminals LNG transfer, vapour return Gr 6 / Gr 7 / Gr 8
Cryogenic Plants LOX, LN2, LH2 transport lines Gr 7 / Gr 8
Refineries Low-temperature hydrocarbon service Gr 6
Gas Processing Units Gas chilling, separation units Gr 6 / Gr 9
Power Plants Chilled water, cold boxes Gr 6 / Gr 9
Petrochemical Units Sub-zero process lines Gr 6 / Gr 3
Marine & Offshore Cryogenic cargo systems Gr 8
EPC Projects LTCS pipeline fabrication Gr 6

Export Packaging & Supply Readiness

To ensure safe transportation and zero damage during export, all LTCS pipes from Inox Steel India follow strict international packing standards:

  • HDPE / Plastic Wrapping
  • Protective end caps
  • Hexagonal bundling & metal strapping
  • Marking: Grade • Heat No. • OD • WT • Standard • MTC
  • Fumigated wooden crates for container shipments
  • Export documents: COO, EN 10204 3.1/3.2, Charpy Test Report, Packing List

🌍 Major Export Destinations:
UAE • Saudi Arabia • Qatar • Oman • Kuwait • Egypt • South Africa • USA • Canada • Mexico • Brazil • Germany • Italy • South Korea • Malaysia

ASTM A333 LTCS Pipe Supplier Near Alankar Cinema, Mumbai

If you are searching for a Low Temperature Carbon Steel (LTCS) ASTM A333 pipe supplier near Alankar Cinema, Mumbai, Inox Steel India is your most reliable source.

We offer:

  • Ready stock of A333 Grade 1–9
  • Special focus on Grade 6 (−45°C) and Grade 8 (−260°C)
  • IBR-approved material (if required)
  • Cryogenic-certified pipes with full traceability
  • Same-day delivery across Mumbai region
  • Export-ready packaging for international shipments

Trusted by EPCs, cryogenic installers, LNG contractors & industrial users.

Talk to Our Technical Sales Team – Immediate Response

Need help choosing the right LTCS grade?
Get expert-grade selection, MTC samples, and quotations within 24 hours.

📥 Downloads Available:
Datasheet • Price List • Impact Test Charts • LNG Service Certification (PDF)

Inox Steel India

52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004

Email

alloy@inoxsteelindia.in

Phone

+91 9930796690

Frequently Asked Questions (FAQs)

Grade 6 is the most widely used LTCS material globally.

  • Gr 6: Standard LTCS, −45°C
  • Gr 8: 9% Nickel Steel, −260°C (LNG-grade)

Yes — Grade 7 and Grade 8 are specifically designed for cryogenic LNG lines.

HSN Code: 7304.19.90

Yes — on request, with complete IBR documentation.

Yes — regular exports to GCC, Africa, Europe & North America.

Yes — mandatory for all LTCS grades.

Order ASTM A53 Pipes Today

Inox Steel India supplies premium-quality ASTM A53 Grade A & Grade B Seamless, ERW & GI Pipes, suitable for structural, water, mechanical, and low-pressure service.
If your project requires reliable performance, quality testing, and competitive pricing — we are ready to serve.

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