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Introduction of Pre-insulated pipe

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insulated pipe

Pre-insulated pipe is consist of steel pipe for transmission medium, polyurethane rigid foam insulation laer an HDPE outer outer protection pipe.

Series of pre-insulated pipe are available in our factory, we can provide DN30-1600mm, all kinds of diameters and insulation thickness of the pipe and the corresponding pipe fittings are available(elbow, tee, reducer, fixed bracket and so on).

Pre-insulated pipe is suitable for pipeline system that with less than 120 degree medium, the peak by accident is less than 140 degree, and operating pressure is not greater than 2.5Mpa.

Pre-insulated pipe carries out the national standard GB/T29047-2012, ministry of construction standard CJ/T114-2000, CJ/155-2001, reference to European EN253(pipeline), EN448(pipe fittings)  standards.

In order to ensure the trinity of pre-insulated pipe structure as a whole, we make the shot blasting for the outer of the steel pipe and corona surface treatment for the plastic outer protecting pipe before foaming, derusting  grade is up to the SA2.5 of the GB/T 8923-1988, the surface tension of outer protection pipe has reached  50 dyne/cm.

we adopts hydraulic adjustable tilt angle injections or use the special-purpose metering pump of high pressure and large flux of vertical injections, ensure uniform foam, inprove the quality of the insulation layer.

Polyethylene outer protection pipe is made of high-quality high density polyethylene resin material: Shanghai Jinfei HHMTR480AT, Qilu petrochemical DGDB2480, Tianjin zhongsha petrochemical PN049(level 100).

The polyurethane insulation layer with good mechanical properties, according to customers’ requirement, we can provide cfc-free water environmental protection insulation pipe, its low thermal conductivity, small heat loss, high mechanical performance and long-term heat resistance, on one side improve the environment and on the other side improve the product performance and quality.

The mark of the pre-insulated pipe

Below information should be marked on the HDPE outer protection pipe: diameter and thickness of working steel pipe, diameter and thickness of the pre-insulated pipe, product standard code, production date and batch number, the logo or name of the manufacturer.

The transportation of the  pre-insulated pipe

Crane should be used in transportation, insulation pipe segments must be used to prevent of the HDPE protection pipe and the insulation layer, in the process of loading, collision and rolling on the ground should be avoided.

The storage of the  pre-insulated pipe

The ground should be flat, no rock and hard sundries, the area can’t be full of water, ensure that the pipe and the joint seal waterproof,  pre-insulated pipe stacking height should not be higher than 2 m, the pipe should not be long time in open air, it is appropriate to use tarpaulin cover to protect the pipe.

 

 

 

 

Scope of DIN/EN Buttwelding Fittings

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Items Type Size Standards related Material
ELBOW Seamless 21.30 x 2.0 mm to 609.60 x 12.50, mm DIN2605,    EN 10253-1. EN 10253-2. St37.0. St35.8. S235. P235GH. P235TR1. P235TR2.
one welding seam 711.00 x 9.53 mm to 914.00 x 12.50 mm.
RETURN BEND Seamless 21.30 x 2.0 mm to 609.60 x 12.50 mm DIN2605,    EN 10253-1. EN 10253-2. St37.0. St35.8. S235. P235GH. P235TR1.P235TR2.
one welding seam 711.00 x9.53 mm to 914.00 x 12.50 mm
TEE Seamless 21.30 x 2.0 mm to 609.60 x 12.50 mm DIN2615,    EN 10253-1. EN 10253-2. St37.0. St35.8. S235. P235GH. P235TR1.P235TR2.
one welding seam 711.00 x9.53 mm to 914.00 x 12.50 mm
REDUCER Seamless 21.30 x 2.0 mm to 609.60 x 12.50 mm DIN2616,    EN 10253-1. EN 10253-2. St37.0. St35.8. S235. P235GH. P235TR1.P235TR2.
one welding seam 711.00 x9.53 mm to 914.00 x 12.50 mm
CAP Seamless 21.30 x 2.0 mm to 1220.00 x 12.50 mm DIN2617,     EN 10253-1. EN 10253-2. St37.0. St35.8. S235.P235GH. P235TR1.P235TR2.

Scope of ASME/ANSI Buttwelding Fittings and Flanges

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Items Type Size Standards related
ELBOW Seamless 1/2″–24″ ASME B16.9, ASME B16.28, ASME B16.49, ASME B16.25,  ISO3419, ANSI/AWWA C208, MSS SP 75.
one welding seam 26″–36″
two welding seam 38″–72″
BEND Seamless 1/2″–24″ ASME B16.9, ASME B16.49, PFI-standard_ES-24.
one welding seam 26″–72″
TEE Seamless 1/2″–24″ ASME B16.9, ASME B16.25, ISO3419, ANSI/AWWA C208, MSS SP 75.
one welding seam 26″–56″
REDUCER Seamless 1/2″–24″ ASME B16.9, ASME B16.25, ISO3419, EN10253-2, ANSI/AWWA C208, MSS SP 75.
one welding seam 26″–72″
CAP Seamless 1/2″–72″ ASME B16.9, ASME B16.25, ISO3419,  MSS SP 75.
FLANGE Seamless 1/2″–72″ ASME B16.5, ASME B16.36, ASME B16.47, API std605, MSS SP-44.

ASTM A216 WCA, WCB, WCC

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ASTM A216 Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature Service

ASTM A216 covers carbon steel castings for valves, flanges, fittings, or other pressure-containing parts for high temperature service and of quality suitable for assembly with other castings or wrought-steel parts by fusion welding.

Three grades, WCA, WCB, and WCC, are covered in this specification. Selection will depend upon design and service conditions, mechanical properties, and the high temperature characteristics.

Chemical Requirements    Composition, %, max

Element UNS J02502 UNS J03002 UNS J02503
Grade WCA Grade WCB Grade WCC
Carbon 0.25A 0.30B 0.25C
Manganese 0.7A 1.00B 1.20C
Phosphorus 0.035 0.035 0.035
Sulfur 0.035 0.035 0.035
Silicon 0.60 0.60 0.60
Specified residual elements:
Copper 0.30 0.30 0.30
Nickel 0.50 0.50 0.50
Chromium 0.50 0.50 0.50
Molybdenum 0.20 0.20 0.20
Vanadium 0.02 0.02 0.02
Total of these specified residual elements 1.00 1.00 1.00

A For each reduction of 0.01 % below the specified maximum carbon content, an increase of 0.04 % manganese above the specified maximum will be permitted up to a maximum of 1.10 %.

B For each reduction of 0.01 % below the specified maximum carbon content, an increase of 0.04 % Mn above the specified maximum will be permitted up to amaximum of 1.28 %.

C For each reduction of 0.01 % below the specified maximum carbon content, an increase of 0.04 % manganese above the specified maximum will be permitted toa maximum of 1.40 %.

 

Tensile Requirements

Grade WCA Grade WCB Grade WCC
Tensile Strength, min ksi [MPa] 60 to 85 [415-585] 70 to 95 [485-655] 70 to 95  [485-655]
Yield Strength,A min ksi [MPa] 30 [205] 36 [250] 40 [275]
Elongation in 2 in. or 50 mm , min, % B 24 22 22
Reduction of area,min, % 35 35 35

A Determine by either 0.2 % offset method or 0.5 % extension-under-load method.

B When ICI test bars are used in tensile testing as provided for in Specification A703/A703M, the gage length to reduced section diameter ratio shall be 4 to 1.

INCONEL® 600

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Inconel® 600

Equivalent designations

UNS N06600

DIN W. Nr. 2.4816

 

Form ASTM
Rod, bar and wire B 166
Plate, sheet and strip B 168, B 906
Seamless pipe and tube B 167, B 829
Welded pipe B 517, B 775
Welded tube B 516, B 751
Welding fitting B 366
Billet and bar for reforging B 472
Forging B 564

 

Chemical composition

%

 Ni Cr Fe C Mn Si S Cu

min

 72.0 14.0 6.0

max

 17.0 10.0 0.15 1.00 0.50 0.015

0.50

 

Physical properties

Density 8.47 g/cm3
Melting range 1354-1413℃

 

Features: Inconel® 600 has good resistance to corrosion and high temperature, and has high strength and good fabricability. It resists chloride-ion-incurred stress corrosion cracking, sulfur compounds and oxidizing conditions at high temperatures.

 

Applications: Chemical process industry, heat treating fixtures, airframe components and nuclear reactors.

 

Note: Inconel® is a registered trademark of the Special Metals Corporation group of companies.

ASTM A516 GR70

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ASTM A516 – Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service

Grade: 70

 

Chemical Requirements

Elements Grade70[485]
Carbon,max A,B:
    1⁄2 in. [12.5 mm] and under 0.27
    Over 1⁄2 in. to 2 in. [12.5 to 50 mm], incl 0.28
    Over 2 in. to 4 in. [50 to 100 mm], incl 0.30
    Over 4 to 8 in. [100 to 200 mm], incl 0.31
    Over 8 in. [200 mm] 0.31
ManganeseB:
    1⁄2 in. [12.5 mm] and under:
        Heat analysis 0.85-1.20
        Product analysis 0.79-1.30
    Over 1⁄2 in. [12.5 mm]:
        Heat analysis 0.85-1.20
        Product analysis 0.79-1.30
Phosphorus,maxA 0.025
Sulfur, maxA 0.025
Silicon:
        Heat analysis 0.15-0.40
        Product analysis 0.13-0.45

A Applies to both heat and product analyses.

B For each reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage point above the specified maximum for manganese is permitted, up to a maximum of 1.50 % by heat analysis and 1.60 % by product analysis.

 

Tensile Requirements

Grade70[485]
Tensile strength, ksi [MPa] 70–90 [485–620]
Yield strength, min,A ksi [MPa] 38 [260]
Elongation in 8 in. [200 mm], min, %B 17
Elongation in 2 in. [50 mm], min, %B 21

A Determined by either the 0.2 % offset method or the 0.5 % extension-under-load method.

B See Specification A20/A20M for elongation adjustment.