CJ/T 200 Pre-Insulated Pipes

Steel-Jacketed Steam Pre-Insulated Pipe Specifications & Insulation Thickness Chart (CJ/T 200)

20# / Q235B core pipe · Q235B outer jacket · Micro-porous calcium silicate + glass wool · DN100 – DN800

CJ/T 200 · GB/T 29047 · EN 253

Dimensions & weight table

Reference values for layout and freight estimates. Confirm critical dimensions against the latest ASME edition and your project ITP before procurement.

DN	NPS	Core pipe	Insulation (mm)	Jacket pipe	Max temp (°C)	Weight (kg/m)
100	4"	DN100 × 4 mm	80	DN219 × 5 mm	350	58
150	6"	DN150 × 4.5 mm	90	DN273 × 6 mm	350	82
200	8"	DN200 × 5 mm	100	DN325 × 6 mm	350	108
250	10"	DN250 × 6 mm	110	DN377 × 7 mm	350	142
300	12"	DN300 × 6 mm	120	DN426 × 7 mm	350	175
400	16"	DN400 × 8 mm	130	DN529 × 8 mm	350	245
600	24"	DN600 × 10 mm	150	DN720 × 10 mm	350	410
800	32"	DN800 × 12 mm	160	DN920 × 12 mm	350	580

EN 10204 3.1 mill test certificate with every shipment

Mill Test Certificate (EN 10204 3.1) for core and jacket steel with welding and test records from in-house QC.

In-house testing & MTR

Yanshan Hengzhenyuan Pipeline is the manufacturer: 3,000-ton hydraulic forming and a central materials lab on site. We do not claim third-party agency endorsements (SGS, BV, TÜV); release is based on our own equipment and EN 10204 3.1 mill test certificates.

1,000 kN Universal Tensile Testing Machine

Yield strength, tensile strength and elongation on heat-lot samples.
Industrial Cold Bend Tester

Weld ductility and base metal bending integrity per project ITP.
Direct-Reading Optical Emission Spectrometer (OES) & Handheld PMI

Full chemical composition and grade verification at receipt and release.
Ultrasonic Flaw Detector (UT) & Magnetic Particle Testing (MT)

Non-destructive testing for critical defects in pipe and welds.

Tests for this product

100% RT or UT on core and jacket girth welds per project WPS
Hydrostatic leak test on working core pipe before insulation closure
Spark holiday detection on outer jacket anti-corrosion coating
Insulation thickness verification and dry density checks on samples

Material data

Design steam temperature: Up to 350 °C (chart reference; confirm for superheated service)
Insulation structure: Micro-porous calcium silicate + centrifugal glass wool composite in steel jacket annulus
Jacket corrosion protection: FBE or 3PE on outer steel shell for direct burial
Leak detection (optional): Alarm wire in annulus available on request

Manufacturing & quality assurance

Yanshan Hengzhenyuan Pipeline — integrated forming, heat treatment, machining and NDT for export utility and EPC programs.

Production capability

Core pipe welding, jacket assembly and insulation injection in prefabricated spools
Medium-frequency induction bending for pre-insulated elbows when required
3000T hydraulic forming for complementary steam system fittings
Factory direct export packing for district heating and industrial steam EPC

Engineering FAQ

The reference chart is sized for saturated steam up to 350 °C. Superheated or higher-pressure systems require individual thermal and wall thickness design.

CJ/T 200 steel-in-steel systems target higher steam temperatures. PU foam systems are used for lower-temperature hot water networks.

We do not list SGS, BV or TÜV endorsements. Quality release is based on in-house NDT, pressure testing and EN 10204 3.1 certificates.

Yes — pre-insulated elbows, reducers and special assemblies can be quoted with the straight pipe schedule.

Quick RFQ

Include quantity, delivery port and required certificates. We will reply with pricing and lead time.