SECTION 15520

STEAM AND STEAM CONDENSATE PIPING

PART 1 GENERAL

WORK INCLUDED

Pipe and pipe fittings.

Valves.

Steam piping system.

Steam condensate piping system.

RELATED WORK

Section [_____ - _____:] Insulation for direct burial of underground services.

Section 08305 - Access Doors.

Section 09900 - Painting.

Section 15060 - Pipe and Pipe Fittings: Piping specialties.

Section 15121 - Expansion Compensation.

Section 15140 - Supports and Anchors.

Section 15190 - Mechanical Identification.

Section 15242 - Vibration Isolation.

Section [_____ - _____:] Mechanical seismic control.

Section 15260 - Piping Insulation.

Section 15525 - Steam and Steam Condensate Specialties.

Section [_____ - _____:] Pipe cleaning.

REFERENCES

ANSI/ASME SEC 9 - Selding and Brazing Qualifications.

ANSI/ASME B16.3 - Malleable Iron Threaded Fittings Class 150 and 300.

ANSI/ASME B16.23 - Cast Copper Alloy Solder Joint Drainage Fittings - DWV.

ANSI/ASME B16.29 - Wrought Copper and Wrought Copper Alloy Solder Joint Drainage Fittings - DWV.

ANSI/ASME B31.1 - Code for Power Piping.

ANSI/ASME B31.9 - Building Services Piping.

ANSI/AWS A5.8 - Brazing Filler Metal.

ANSI/AWS D1.1 - Structural Welding Code.

ASTM A53 - Pipe, Steel, Black and Hot-Dipped Zinc Coated, Welded and Seamless.

ASTM A120 - Pipe, Steel, Black and Hot-Dipped Zinc Coated (Galvanized), Welded and Seamless, for Ordinary Uses.

ASTM A234 - Pipe Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and Elevated Temperatures.

ASTM B32 - Solder Metal.

ASTM B88 - Seamless Copper Water Tube.

REGULATORY REQUIREMENTS

Conform to ANSI/ASME B31.9[.] [and ANSI/ASME B31.1.]

QUALITY ASSURANCE

Valves: Manufacturer's name and pressure rating marked on valve body.

Welding Materials and Procedures: Conform to ANSI/ASME SEC 9[.] [and applicable state labor regulations.]

Welders Certification: In accordance with [ANSI/ASME SEC 9.] [ANSI/AWS D1.1.] [________________________________.]

SUBMITTALS

Submit product data under provisions of Section [01300.] [01340.]

Include data on pipe materials, pipe fittings, valves and accessories.

Include welders certification of compliance with [ANSI/ASME SEC 9.] [ANSI/AWS D1.1.] [_______________.]

DELIVERY, STORAGE, AND HANDLING

Deliver products to site under provisions of Section [01600.] [01610.]

Store and protect products under provisions of Section [01600.] [01620.]

Deliver and store valves in shipping containers with labelling in place.

PART 2 PRODUCTS

HIGH PRESSURE STEAM PIPING, BURIED

Steel Pipe: ASTM A53 or A120, Schedule 80, [0.375 inch

(10 mm) wall for sizes 16 inch (400 mm) and over,] black.

Fittings: ASTM A234, forged steel welding type, Class 300.

Joints: ANSI/AWS D1.1, welded.

Casing: [__________.] [Refer to Section [_____.]]

Copper Tubing: ASTM B88, Type K, [annealed.] [hard drawn.]

Fittings: ANSI/ASME B16.29, wrought copper.

Joints: ANSI/ASTM [B32, solder, Grade 95TA.] [ANSI/AWS A5.8 BCuP, silver braze.]

Casing: [_______________.] [Refer to Section [_____.]]

HIGH PRESSURE STEAM PIPING, ABOVE GROUND

Steel Pipe: ASTM A53 or A120, Schedule 80, [0.375 inch

(10 mm) for sizes 16 inch (400 mm) and over,] black.

Fittings: ANSI/ASTM B16.3, malleable iron Class 250, or ASTM A234 forged steel welding type, Class 300.

Joints: Screwed, or ANSI/AWS D1.1 welded.

Copper Tubing: ASTM B88, Type K, hard drawn.

Fittings: ANSI/ASME B16.23, cast brass, or ANSI/ASTM B16.29, wrought copper fittings.

Joints: [ANSI/ASTM B32, solder, Grade 95TA.] [ANSI/AWS A5.8, BCuP silver braze.]

LOW PRESSURE STEAM PIPING, BURIED

Steel Pipe: ASTM A53 or A120, Schedule 40, [0.375 inch

(10 mm) wall for sizes 16 inch (400 mm) and over,] black.

Fittings: ASTM A234, forged steel.

Joints: ANSI/AWS D1.1, welded.

Casing: [________________________.]

Copper Tubing: ASTM B88, Type L, [hard drawn.] [annealed.]

Fittings: ANSI/ASME B16.29 wrought copper.

Joints: [ANSI/ASTM B32, solder, Grade 95TA.] [ANSI/AWS A5.8, BCuP silver braze.]

Casing: [______________________________.]

LOW PRESSURE STEAM PIPING, ABOVE GRADE

Steel Pipe: ASTM A53 or A120, Schedule 40, [0.375 inch

(10 mm) wall for sizes 12 inch (300 mm) and over,] black.

Fittings: ANSI/ASTM B16.3, malleable iron Class 125, or ASTM A234, forged steel Class 125.

Joints: Screwed, or ANSI/AWS D1.1, welded.

Copper Tubing: ASTM B88, Type L, hard drawn.

Fittings: ANSI/ASME B16.23, cast brass, or ANSI/ASME

B16.29, wrought copper.

Joints: [ANSI/ASTM B32, solder, Grade 95TA.] [ANSI/AWS A5.8, BCuP silver braze.]

HIGH PRESSURE STEAM CONDENSATE PIPING, BURIED

Steel Pipe: ASTM A53 or A120, Schedule 80, [0.375 inch

(10 mm) wall for sizes 12 inch (300 mm) and over,] black.

Fittings: ANSI/ASTM B16.3, malleable iron Class 125, or ASTM A234, forged steel Class 125.

Joints: Screwed, or ANSI/AWS D1.1, welded.

Casing: [____________________.] [Refer to Section [_____.]]

Copper Tubing: ASTM B88, Type K, [annealed.] [hard drawn.]

Fittings: ANSI/ASME B16.29, wrought copper.

Joints: [ASTM B32, solder, Grade 95TA.] [ANSI/AWS A5.8, BCuP silver braze.]

Casing: [___________________.] [Refer to Section [_____.]]

HIGH PRESSURE STEAM CONDENSATE PIPING, ABOVE GROUND

Steel Pipe: ASTM A53 or A120, Schedule 80, [0.375 inch

(10 mm) wall for sizes 12 inch (300 mm) and over,] black.

Fittings: ANSI/ASTM B16.3, malleable iron Class 125, or ASTM A234, forged steel Class 125.

Joints: Screwed, or ANSI/AWS D1.1, welded.

Copper Tubing: ASTM B88, Type K, hard drawn.

Fittings: ANSI/ASME B16.23, cast brass or ANSI/ASME B16.29, wrought copper.

Joints: [ASTM B32, solder, Grade 95TA.] [ANSI/AWS A5.8, BCuP silver braze.]

LOW PRESSURE STEAM CONDENSATE PIPING, BURIED

Steel Pipe: ASTM A53 or A120, Schedule 40, [0.375 inch

(10 mm) wall for sizes 12 inch (300 mm) and over,] black.

Fittings: ANSI/ASTM B16.3, malleable iron Class 125, or ASTM A234, forged steel, Class 125.

Joints: Screwed, or ANSI/AWS D1.1, welded.

Casing: [_____________________________________.]

Copper Tubing: ASTM B88, Type L, [annealed.] [hard drawn.]

Fittings: ANSI/ASME B16.29, wrought copper.

Joints: [ASTM B32, solder, Grade 95TA.] [ANSI/AWS A5.8, BCuP silver braze.]

Casing: [_____________________________________.]

LOW PRESSURE STEAM CONDENSATE PIPING, ABOVE GRADE

Steel Pipe: ASTM A53 or A120, Schedule 80, [0.375 inch

(10 mm) wall for sizes 12 inch (300 mm) and over,] black.

Fittings: ANSI/ASTM B16.3, malleable iron Class 125, or ASTM A234, forged steel Class 125.

Joints: Screwed, or ANSI/AWS D1.1, welded.

Copper Tubing: ASTM B88, Type L, hard drawn.

Fittings: ANSI/ASME B16.23, cast brass or ANSI/ASME B16.29, wrought copper.

Joints: [ANSI/ASTM B32, solder, Grade 95TA.] [ANSI/AWS A5.8, BCuP silver braze.]

FLANGES, UNIONS, AND COUPLINGS

Pipe Size 2 Inches (50 mm) and Under: 150 psig (1 034 kPa) [galvanized] malleable iron unions for threaded ferrous piping; bronze unions for copper pipe, soldered joints.

Pipe Size Over 2 Inches (50 mm): 150 psig (1 034 kPa) forged steel slip-on flanges for ferrous piping; bronze flanges for copper piping; 1/16 inch (1.6 mm) thick preformed neoprene.

Dielectric Connections: Union with galvanized or plated steel threaded end, copper solder end, water impervious isolation barrier.

ACCEPTABLE MANUFACTURERS - GATE VALVES

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

GATE VALVES

Up to 2 Inches (50 mm): Bronze body, bronze trim, [non-rising] [rising] stem, handwheel, inside screw, [single] [double] wedge or disc, [solder] [threaded] ends.

Over 2 Inches (50 mm): Iron body, bronze trim, [rising] [non-rising] stem, handwheel, OS&Y, [single] [double] wedge, [flanged] [grooved] ends.

ACCEPTABLE MANUFACTURERS - BALL VALVES

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

BALL VALVES

Up to 2 Inches (50 mm): [Bronze] [Stainless steel] [one] [two] piece body, stainless steel ball, teflon seats and stuffing box ring, lever handle[,] [and balancing stops,] [solder] [threaded] ends[.] [with union.]

Over 2 Inches (50 mm): Cast steel body, chrome plated steel ball, teflon seat and stuffing box seals, lever handle[,] [or gear drive handwheel for sizes 10 inches (250 mm) and over,] flanged.

ACCEPTABLE MANUFACTURERS - SWING CHECK VALVES

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

SWING CHECK VALVES

Up to 2 Inches (50 mm): Bronze or iron body, 45 degree swing disc, [solder] [screwed] ends.

Over 2 Inches (50 mm): Iron body, bronze trim, [45] [22] degree swing disc, renewable disc and seat, flanged ends.

PART 3 EXECUTION

PREPARATION

Ream pipe and tube ends.	Remove burrs. [Bevel plain end ferrous pipe.]

Remove scale and dirt on inside and outside before assembly.

Prepare piping connections to equipment with flanges or unions.

After completion, fill, clean, and treat systems. Refer to Section [_____.]

INSTALLATION

Route piping in orderly manner, plumb and parallel to building structure, and maintain gradient.

Install piping to conserve building space and not interfere with use of space, other work, or equipment.

Install piping to allow for expansion and contraction without stressing pipe, joints, or connected equipment. Refer to Section 15121.

Provide clearance for installation of insulation and access to valves and fittings.

Provide access where valves and fittings are not exposed. [Coordinate size and location of access doors with Section 08350.]

Slope steam piping one inch in 40 feet (0.25 percent) in direction of flow. Use eccentric reducers to maintain bottom of pipe level.

Slope steam condensate piping one inch in 40 feet (0.25 percent). Provide drip trap assembly at low points and before control valves. Run condensate lines from trap to nearest condensate receiver. Provide loop vents over trapped sections.

Where pipe support members are welded to structural building framing, scrape, brush clean, and apply one coat of zinc rich primer to welding.

Prepare pipe, fittings, supports, and accessories for finish painting. Refer to Section 09900.

Install valves with stems upright or horizontal, not inverted.

APPLICATION

Install unions downstream of valves and at equipment or apparatus connections. Install dielectric unions where joining dissimilar materials.

Install brass male adapters each side of valves in copper piped system. Sweat solder adapters to pipe.

Install [gate] [ball] valves for shut-off and to isolate equipment, part of systems, or vertical risers.

Install [gate] [ball] valves for throttling, bypass, or manual flow control services.

END OF SECTION