Carbon Steel Ball Valves – Materials and Services

1. SCOPE…………………………………………………….2. REFERENCES
2. GENERAL
3. ADDITIONAL MATERIAL REQUIREMENTS

1. Scope

1.1 This specification is to assist the user in the application and adaption of the ball valves described in

PIP PNSMV006. The valves are of impact tested, killed, or plain carbon steel, with bolted or unibody,

flanged (raised faced) or socket welded, full or regular bore, and are of floating or trunnion mounted

construction. Nominal pipe sizes NPS 1

/2 to 24 for Classes 150 to 600 are covered.

1.2 This specification shall be used in conjunction with SES P18-G01.

1.3 This specification is one of a four part series for ball valves, each of which represents a group of like

materials, see 3.2.

1. References

Reference is made in this specification to the following documents. The latest issues, amendments, and

supplements to these documents shall apply unless otherwise indicated.

SABIC Engineering Standards (SES)

P02-S01 Piping Materials Standards Specification-Part 1, Group 1

P18-G01 Design Limitations and Applications of Valves

P19-S02 Low and Intermediate Alloy Steel Ball Valves – Materials and Services

P19-S03 Stainless Steel Ball Valves – Materials and Services

P19-X01 Ball Valve Data Sheet

American Society of Testing and Materials (ASTM)

A 193 Alloy-Steel and Stainless Steel Bolting Materials for High Temperature Service

National Association of Corrosion Engineers (NACE)

MR0175 Standard Material Requirements – Sulfide Stress Cracking

Process Industry Practices (PIP)

PNSMV006 Carbon Steel – Ball Valve Descriptions

PNSMV026 Stainless Steel – Ball Valve Descriptions

PNSMV036 Bronze and Iron – Ball Valve Descriptions

1. General

3.1 The carbon steel ball valves described in PIP PNSMV006 and this specification shall be used in

general process services, which shall include but not be limited to general hydrocarbons, steam,

condensate, air, boiler feed water, low temperature hydrocarbons (NGL, LPG), dry hydrogen, naphtha,

amines (DGA, DEA, MEA, SOLFINOL, and CATACARB), amino diisopropanol (ADIP), flare lines and dry

carbon dioxide.

3.2 The other specifications in this series are

a. SES P19-S03, which covers stainless steel ball valves described in PIP PNSMV026, and used

in corrosive services

b. Ball valves described in PIP PNSMV036, and used in utility services

3.3 Valves in new piping systems shall conform to PIP PNSMV006 and this specification. Valves for

maintaining or tie-in to existing systems may be in accordance with original specifications.

3.4 PIP PNSMV006 describes the valves, their components, and their materials of construction. The trim

for ball valves comprises the ball, stem, and the metal seat or seat retainers and small internal parts that

contact the service fluid.

3.5 The valves have unique valve number designations, for example BA-102, by which they are referred

to in the PIP line classes. See PIP PNSMV006 Section 6 for applicable line classes.

3.6 All design, material, service, inspection, marking, documentation, shipping and other requirements
shall be specified on the data sheet SES P19-X01. This shall be attached to the requisition/purchase order.
4. Additional Material Requirements
For services where the materials specified in PIP PNSMV006 are inadequate, the following requirements
shall be met:
4.1 Materials shall be suitable for continuous exposure at the service conditions and ratings specified.
4.2 Valve components in rubbing or sliding contact shall not gall.
4.3 The corrosion resistance of body-bonnet and packing gland bolting, and ring joint gasket material shall
be at least equal to the material of the body and bonnet. However, the bolting material is not required to be
more corrosion resistant than austenitic stainless AISI Type 304 (in accordance with ASTM A 193) unless
otherwise specified in the purchase order.
4.4 For low temperature services between -20
C and -45
C, all non-metallic seats, seals and packing
shall retain adequate resilience after prolonged and cyclic loading. Impact resistance of carbon steel shall
conform to the requirements of SES P02-S01.
4.5 Cyanides, acids, acid salts and wet H2S, or sour service promote sulfide (stress corrosion) cracking.
This situation shall be mitigated by maintaining maximum ductility in the valve parts. Maximum hardness
limits shall be as specified in NACE MR0175. Body-to-bonnet bolting shall be in accordance with
NACE MR0175 Class III. However, when the valve is to be insulated, or buried, it shall be in accordance
with NACE MR0175 Class I or II. Weldments shall be stress relieved in accordance with NACE sections 3
and 4.
4.6 The packing material shall be chemically compatible with the fluid, and have sufficient sealing
properties at the temperature of operation. Packing shall be asbestos-free, and corrosion inhibited, to avoid
stem pitting. In hydrocarbon services, packing and stem seals shall not be pure polymer/elastomer unless
the valves have been qualified as fire safe.