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วันพุธที่ 28 ธันวาคม พ.ศ. 2559

FITTING ASTM A234 WPB

ASTM A234 WPB Standard Specification

ASTM A234 WPB is the Standard Specification for Piping Fittings Carbon Steel and Alloy Steel for Moderate and High Temperature Service.

Pipe bend

A bend is typically of the same material and typically a more gentle bend to prevent kinking.

ASTM A234 Scope

1.1 This specification covers wrought carbon steel and alloy steel fittings of seamless and welded construction covered by the latest revision of ASME B16.9, B16.11, MSS-SP-79, MSS-SP-83, and MSS-SP-95. These fittings are for use in pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures. Fittings differing from these ASME and MSS Standards shall be furnished in accordance with Supplementary Requirement S58 of Specification A 960/A 960M.

1.2 Optional supplementary requirements are provided for fittings where a greater degree of examination is desired. When desired, one or more of these supplementary requirements may be specified in the order.

1.3 This specification does not cover cast welding fittings or fittings machined from castings. Cast steel welding fittings are governed by Specifications A 216/A 216M and A 217/A 217M.

1.4 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.

1.5 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

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วันอังคารที่ 27 ธันวาคม พ.ศ. 2559

MSS SP-75

Specification for High-Test, Wrought, Butt-Welding Fittings

MSS SP-75 specification covers factory-made, seamless and electric welded carbon and low alloy steel, butt-welding fittings for use in high pressure gas and oil transmission and distribution systems, including pipelines, compressor stations, metering and regulating stations, and mains.

MSS SP-75 Standard Practice governs dimensions, tolerances, ratings, testing, materials, chemical and tensile properties, heat treatment, notch toughness properties, manufacture and marking for high-test, butt-welding fittings NPS 60 and smaller. Dimensional requirements for NPS 14 and smaller are provided by reference to ASME B16.9.

The term “welding fittings” applies to butt-welding fittings such as elbows, segments of elbows, return bends, caps, tees, single or multiple-outlet extruded headers, reducers, and factory-welded extensions and transition sections.

Fittings may be made to special dimensions, sizes, shapes, and tolerances, or of wrought materials other than those covered by this Standard Practice by agreement between the manufacturer and the purchaser. When such fittings meet all other stipulations of this Standard Practice they shall be considered as being in partial compliance therewith, providing they are appropriately marked.

12 Soi Bangna-Trad25, Bangna, Bangna, Bangkok Thailand 10260

Tel. 02-7440761

Fax. 02-7443230

ฝ่ายขาย 24 ชม. M. 086-3679336, 095-9627339, 061-5906036

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วันเสาร์ที่ 24 ธันวาคม พ.ศ. 2559

Which difference astm a53 and astm a106

For example when we compare between A106-B and A53-B seamless from chemical composition point of view, we find that :

1. A106-B contains silicon, min. 0.10% where A53-B has zero%, and silicon is the important element for improving the heat resistance criteria.

2. A106-B contains manganese 0.29-1.06%, where A53-B 1.2%.

3. A106-B contains low sulfur and phosphorus, max. 0.035% where A53-B contains 0.05 and 0.045% respectively.

12 Soi Bangna-Trad25, Bangna, Bangna, Bangkok Thailand 10260

Tel. 02-7440761

Fax. 02-7443230

ฝ่ายขาย 24 ชม. M. 086-3679336, 095-9627339, 061-5906036

Email : ฝ่ายขาย toptecworld69aey@gmail.com ,
toptecworld@gmail.com

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วันศุกร์ที่ 23 ธันวาคม พ.ศ. 2559

ASME B16.11, Forged Fittings

ASME B16.11, Forged Fittings, Socket-Welding and Threaded

ASME B16.11 Standard covers ratings, dimensions, tolerances, marking and material requirements for socket-welding and threaded forged fittings. These fittings are designated as Class 2000, 3000, and 6000 for threaded end fittings and Class 3000, 6000, and 9000 for socket-weld end fittings.

B16.11 is to be used in conjunction with equipment described in other volumes of the ASME B16 series of standards as well as with other ASME standards, such as the Boiler and Pressure Vessel Code and the B31 Piping Codes.

Careful application of these B16 standards will help users to comply with applicable regulations within their jurisdictions, while achieving the operational, cost and safety benefits to be gained from the many industry best-practices detailed within these volumes.

Intended for manufacturers, owners, employers, users and others concerned with the specification, buying, maintenance, training and safe use of wrought and forged fittings with pressure equipment, plus all potential governing entities.

This Standard covers ratings, dimensions, tolerances, marking, and material requirements for forged fittings, both socket-welding and threaded, as illustrated in Tables 1 through 5 and Tables I-1 through I-5, inclusive.

12 Soi Bangna-Trad25, Bangna, Bangna, Bangkok Thailand 10260

Tel. 02-7440761

Fax. 02-7443230

ฝ่ายขาย 24 ชม. M. 086-3679336, 095-9627339, 061-5906036

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