SECTION 15009 DETAIL PIPING SPECIFICATION – SEAMLESS CARBON STEEL PIPE AND FITTINGS

This spec was part of the Des Plaines, IL River WRF project that bid Feb 26, 2015.


SECTION 15009

DETAIL PIPING SPECIFICATION – SEAMLESS CARBON STEEL PIPE AND FITTINGS


PART 1 GENERAL

1.1 SECTION INCLUDES

A. Seamless carbon steel pipe and malleable iron fittings.

1.2 RELATED SECTION

A. Section 15000 - Plant Piping - General:

B. See referenced Section for additional requirements.

1.3 SUBMITTALS

A. As specified in Section 15000.

B. Welding procedures and qualifications.

C. Submit a list of the welders he proposes using and the type of welding for which each has been qualified.

D. Submit review procedure specifications and qualifications records of welding procedures for all pipe welding to be performed under this section, in accordance with Section IX, Article II of the ASME Boiler and Pressure Vessel Code.

E. Submit design for the expansion and support system.


PART 2 PRODUCTS

2.1 PIPE

A. General Pipe Requirements:
1. Piping ½-inch through 1½-inch: ASTM A 106, Grade B, extra strong wall thickness.
2. Piping 2-inch through 14-inch: Seamless, ASTM A 53, TP-S Grade B, standard wall thickness.

B. Butt-Welded, and Flanged Pipe:
1. ½-inch through 1½-inch: Schedule 80.
2. 2-inch through 14-inch: Schedule 40.

2.2 JOINTS

A. Requirements for Specific Types of Joints:
1. ½-inch through 14-inch: Butt-welded, or flanged.

2.3 FITTINGS

A. ½-inch through 1½-inch:
1. General requirements: Forged carbon steel fittings, ASTM B16-11, ASTM A105, Class 300 socket-weld.
2. Socketweld Tee: Carbon Steel, ASTM A105, Class 300 socket-weld welding outlet, for branch NPS ½ through 1½ refer to Service Branch Construction Table.

B. 2-inch Through 14-inch:
1. General requirements: Carbon steel fittings, ASME B16.9, ASTM A234 Grade WPB, Standard WT butt weld.
2. Socketweld Tee: Carbon Steel, ASTM A105, Butt-weld welding outlet, for Standard WT header and Standard WT branch, for branch NPS 2 through 14 refer to Service Branch Construction Table.

Service Branch Table




2.4 FLANGES

A. ½-inch through 1½-inch: Forged carbon steel flanges, ASTM A105, ASTM B16.5, Class 300 welding neck, raised face, with XS WT bore.

B. 2-inch Through 14-inch: Forged carbon steel flanges, ASTM A105, ASTM B16.5, Class 300 welding neck, raised face, with WT bore.

C. Use welding neck flanges when abutting butt-weld fittings. Match Welding neck bore pipe ID.

D. Machine off the raised face of a steel flange when mating with a cast iron flat faced flange.

2.5 BOLTING

A. Alloy continuous threaded stud, ASTM A193 Grade B7 with heavy hex nuts, ASTM A194 Grade 2Hwith threads conforming to ASME B1.1 coarse type, with Class 2A fit for bolts and studs, and Class 2B for nuts, for Class 300 joint.

2.6 GASKETS

A. Stainless alloy spiral wound gasket, ASME B16.20, Class 300 0.175-inch thick 304 SS/flexible graphite.

2.7 COVERED WELDING ELECTRODES

A. AWS A5.1, E6010 for shielded metal-arc process.

2.8 WELDING ROD AND BAR ELECTRODES

A. As specified in PROCEDURE QUALIFICATIONS.

2.9 EXPANSION JOINTS

A. Metal Bellows Expansion Joints:
1. Metal expansion joints shall consist of a single hydraulically formed metal bellows that is hydraulically formed and flange end fittings. Flanges shall be carbon steel and B31.5 300# type. The bellows shall be 316 stainless steel.
2. Joints shall be designed to meet the design pressures and temperature for the system, and shall be capable of accommodating piping system and equipment movements as needed.
3. Joints are to be provided with stainless steel drop-in liners and carbon steel covers. Tie rods shall be included to prevent overextension of the expansion joints from pressure thrust loads. The number and size of the control rods shall be sufficient for the maximum system test pressure.
4. Expansion joints shall be Flexicraft Industries, Model NLC, or equal.

B. Externally Pressurized Expansion Joint:
1. Provide externally pressurized expansion joint with heavy external casing and internal stainless steel bellows. Flanges shall be carbon steel and B31.5 300# type.
2. Joints shall be designed to meet the design pressures and temperature for the system, and shall be capable of accommodating piping system and equipment movements as needed.
3. Joints shall have a compression of 4, 6, or 8 inches, as needed by piping system.
4. Provide with drain and plug.
5. Expansion joints shall be Flexicraft Industries, Model EP, or equal.

PART 3 EXECUTION

3.1 WELDING

A. In accordance with latest editions of Section IX, ASME Boiler and Pressure Vessel Code and the American national Standard Code for Pressure Piping or AWS B2.

3.2 WELDING PERFORMANCE QUALIFICATION

A. Qualify all welders and welding operators at the Contractor's sole expense by a qualified testing laboratory before performing any welding under this section.

B. Qualification tests: Perform qualification tests in accordance with Section IX, Article III of the ASME Boiler and Pressure Vessel Code.

C. Qualify welders and operators for making groove welds in carbon steel pipe in positions 6G for each welding process to be used.

D. Qualification tests may be waived if evidence of prior qualification is deemed suitable by the Engineer.

E. Retest any welders at any time Engineer considers the quality of the welder's work substandard.

3.3 FABRICATION

A. End Preparation:
1. Prepared Pipe edges preferably by machine shaping.
2. Oxygen or arc cutting are acceptable only if the cut is reasonably smooth and true and all slag is removed either by chipping or grinding.
3. Bevel ends for butt welding to conform to ANSI B16.25.

B. Cleaning: Surfaces shall be clean and free of paint, oil, rust, scale, slag, or other material detrimental to welding.

C. Alignment and Spacing: Align ends to be joined within existing commercial tolerances on diameters, wall thicknesses, and out-of-roundness. Root opening of the joint shall be as stated in the procedure specification.

D. Procedure:
1. Field welding: Use the shielded metal-arc process.
2. Shop fabrication: Fabricate in accordance with the submitted welding procedure qualifications.
3. Perform no welding if there is impingement of any rain, snow, sleet, or high wind on the weld area or if the ambient temperature is below 32° F.
4. If the ambient temperature is less than 32° F preheat the work to a temperature that is warm to the touch of a hand.
5. Tack welds:
a. Perform tack welds by a qualified welder using the same procedure as for the completed weld.

b. Completely removed tack welds that have cracked or do not match the requirements of the completed weld.
c. Make tack welds that are not to be removed with an electrode that is the same as or equivalent to the electrode to be used for the first weld pass.
6. Thoroughly clean each layer of deposited weld metal before the deposition of each additional layer of weld metal, including the final pass, with a power-driven wire brush.
7. Chip or grind out surface defects that will affect the soundness of weld.
8. On pipe sizes 6-inch through 14-inches, make a minimum of three weld passes using the specified covered electrode.
9. On all welded pipe 4-inch and under, make a minimum of a full root and second pass weld.
10. Finished welds: Free of cracks, incomplete penetration, weld undercutting, excessive weld reinforcement, porosity, slag inclusions, and other defects in excess of the limits prescribed in Chapter V of ANSI B31.3.
11. Branch connections: Fit and groove-welded in accordance with the details described and shown in Chapter V of ANSI B31.3.

3.4 TESTING

A. Hydrostatically or pneumatically test all lines at the pressures listed in the Piping Schedule.

B. Follow procedures as specified in Section 15000.

3.5 BUILDING PIPING EXPANSION PROVISIONS

A. Design and supply necessary expansion joints, anchorage and guides to accommodate for pipe thermal growth at dryer design temperature. Assume a 70° F installation temperature and a 500° F operating temperature.

B. Coordinate the expansion provisions with the supports and hangers.

3.6 SUPPORTS AND HANGERS

A. As specified in Section 15000.

B. Design supports and hangers to account for changes from thermal expansion and to control pipe movement as well as support weights.

3.7 CORROSION PROTECTION

A. Not Required.

3.8 GENERAL INSTALLATION OF EXPOSED PIPING

A. As specified in Section 15000.


END OF SECTION